Ceruli, Guru of Dark World is the first of three Dark World cards that are vital to the success of a Dark World Deck. The need for your opponent to discard from your hand is tremendous as that is when your Dark Worlds maximize their effects. In the past, we just had one card that could accomplish this and that was Dark Deal. It is important to set all of your magic and trap card and have nothing but monsters that have discard effects to enhance your chances of success.
 
Ceruli can be a difficult card to understand, so let me tell you how it works. First you discard it with a Dark World card effect. Cards like Dark Deal, The Gates of Dark World, Dark World Dealings, and Dark World Lightning are perfect for this use. Then Ceruli is special summoned to your opponent’s side of the field in face-up defense position. Then Ceruli’s last effect activates and forces you to discard. Because Ceruli is controlled by your opponent, your discarded Dark World monster will get its secondary effect (if any) and wreak havoc upon your opponent.
 
Another neat trick is to special summon Ceruli with Gateway to the Dark World during your opponent’s end phase. This will force him/her to discard. Then on your turn, bounce it with Grapha, Dragon Lord of Dark World to special summon Grapha from the graveyard and reuse Ceruli. Unfortunately for Dark Worlds, they are very dependant on card effects, or I would rare this card higher. They have amazing abilities, but they tend to burn out and fade away mid game. In play testing, I find them to be very useful as a control deck with Deck Devastation Virus, Eradicator Epidemic Virus, and Mind Crush. Ceruli tends to be a very good control card as well.
 
Advanced: 1/5
Traditional: 1/5 (3/5 for Dark Worlds only as it is useless in any other deck.)

Sorry for my absence yesterday! But I'm back and this time with Ceruli, Guru of Dark World!
 
First appearing in the Yu-Gi-Oh GX anime under the control of Brron, Mad King of Dark World. Ceruli has been a card that players have wanted in the game ever since. But now that it is here, people aren't using it, why is that?
 
Dark World decks these days are a dime a dozen and there isn't much variation to the "top-tier" builds, with Ceruli essentially acting as a discard outlet that requires a discard outlet AND gives your opponent a monster to work with. Not worth using in the minds of a lot of people.
 
However, I don't think it's a complete write-off. I've seen Dark World variants that utilize Ceruli that work well (maybe not as consistent or top-tier, but workable none the less.)
 
Traditional: 2/5 - A DARK monster that's good for Chaos fodder, but probably isn't worth it do to the convoluted nature of the card.
Advanced: 3/5 - In a dedicated Dark World build only. However, it is probably worth making a more orthodox DW build instead.
Art: 3/5 - Dark Worlds are awesome. is helmet thing is weird though.

Today we’re back to new cards with Celuri, Guru of Dark World!

Today’s card has an effect that can confuse you if you don’t pay attention. If discarded by a card effect, Celuri is special summoned to the opponent’s side of the field. “Why would it do that?” you say. If special summoned by a “Dark World” card, your “opponent” must discard 1 card. So you give your opponent a monster to make them discard? No, you give them a monster to make you discard. Since Celuri is on the opponent’s side when the effect activates, the term “your opponent” refers to the owner. And since Celuri is making you discard by an opposing card effect, your Dark World secondary effects kick in if you discard them.

You could pull off a strong first turn with Grapha and Celuri. Grapha’s card destruction and monster theft effects will both activate. This would remove Celuri (so the opponent can’t use him), give you information about the opponent’s hand, steal a monster (take away their key monster for their combo), and still leave you with a normal summon to summon Grapha with. You can also use Gateway to Dark World to revive Celuri to make your opponent discard (careful not to use this in a mirror match though). Another benefit that Celuri has is its level 1 status. This means that you can use One for One in a pinch if you want. If there are any Rank 1 monsters in the future that only needs two Xyz materials, then this card will have a little more use. For right now, Celuri is more of a budget duelist’s card. For those unable to afford Rank 5 Xyz or to afford multiple structure decks, Celuri provides a useful backup strategy.

Traditional: 1.5/5 (too slow and combo oriented)
Advanced: 3/5 (decent in Dark World if you want something new or if you prefer Reign-Beaux)
Art: 4/5 (did’ja know that Celuri was originally Anime only?)

Ceruli, Guru of Dark World

Dark/Fiend/1 star/ 100 ATK/ 300 DEF

His effect in a nut shell is if he is discarded by a card effect (not a cost), special summon it to your opponent’s side of the field. Your opponent, now you, MUST discard 1 card.

Pros: You get the effects of your DW monsters because Ceruli’s effect is now considered your opponent’s card effect. May your effects lead you to victory!!!!

Cons: It forces you to run cards like Reignbeux, Goldd, and Sillva if you were already weren’t running them. Also, it is a FREE Tribute/Sycnhro fodder for your opponent.

For those who haven’t noticed, and there are very few who still don’t know, each Dark World monster is based off a color. This little bugger is Cerluli, a spinoff of Cerulean (cape color). Anyways, this card can be very devastating with a well timed Goldd/Grapha/Reignbeaux/Sillva. Just like I mentioned in my cons, this card almost forces you to run a high number of higher level Dark Worlds. Having a build revolving around Ceruli can lead you to have a lot of dead cards in hand if you have no way of discarding them. The reward doesn’t seem very high, but the risk just might be worth it.

Traditional: 2/5

Advanced: 3/5 (Can potentially be lethal)

For day 3 of the best COTD week we have
Ceruli, Guru of Dark World

If this card is discarded to the Graveyard by a card effect: Special Summon this card from the Graveyard to your opponent's side of the field in face-up Defense Position. When this card is Special Summoned by the effect of a "Dark World" card: Your opponent must discard 1 card.

Here is the love child of the Dark World archtype, you couldn't ask for a better monster for the deck well at the top of the list any way. What this little card will do is get your effect to go off when he is discarded from the hand, also on a fun note if you use gateway to dark world to bring him back, the opponet will have to discard.

5/5

Ceruli, Guru of Dark World
Lv. 1/DARK/Fiend/100A/300D
"If this card is discarded to the Graveyard by a card effect: Special Summon this card from the Graveyard to your opponent's side of the field in face-up Defense Position. When this card is Special Summoned by the effect of a "Dark World" card: Your opponent must discard 1 card."

The first of the new DW cards is a pretty useful one. Since DW monsters get their best (or in some cases only) effects if it is a opponent-controlled card that causes the the DW monster to be discarded. If you special summong this with any DW card effect, such as Gates of Dark World, then you can force the opponent to discard instead.

But it's when he gets special summoned to the opponent's field that this guy shines, setting up your best combos. Also, You can easily steamroll right over him right away (barring Dark Deal making him get discarded, of course.)

Traditional: 2.5
Advanced 4

The middle of the week brings the COTD reviewers to a card that really could scare your opponent if they are not paying attention. Ceruli is a LVL 1, Dark, Fiend with 100 ATK and 300 DEF. Ceruli's effect is when he's discarded by a card effect to the grave, special summon Ceruli to your opponent's side of the field in face up defense position. Here's where Ceruli can get scary. If he is special summoned to your opponent's field by the effect of a Dark World card, Ceruli's discard effect works for you, so you get to discard a card from your hand. Like I said before, discard is Dark World's favorite word. You can get discard Goldd or Sillva, or whatever Dark World monster you may want to get in the grave. The down side is your opponent gets a free monster to use for their own uses assuming they can protect themselves. If I were running Dark World, i'd run 1 of Ceruli. A decent effect that can catch your opponent off guard, but it takes a little building up to.
 
Traditional: 1
Advanced: 2
Tomorrow: Winter wonderland in Dark World.