Happy Spring! The Phantom Knights of Ancient Cloak is a Level 3 Dark Warrior-type monster with 800 Atk and 1000 Def. Those stats look...familiar. A quick glance back at squires and vassals and we discover that Ancient Cloak has the exact stats to be a Squire/Vassal for Monarch decks. Edea can Special Summon it straight to the field. Phantom Knights in general just recently got the beginnings of a decent deck. Level 3 is nice, but 4 probably would have been better. Level 3 is also too high for such low Atk and Def stats. Dark is always good and I believe the entire archetype uses and boosts Dark monsters. Warrior makes this a good ROTA target. All around, these are good stats, and the effects aren't half bad either. 
 
The Phantom Knights of Ancient Cloak has 2 effects. While on the field in attack position, you can target any Dark monster on the field including itself. Then Ancient Cloak switches to defense position and the targeted monster gains 800 Atk and Def. 800 Atk isn't that much, but it does last through your opponent's turn. The second effect costs banishing itself from the Graveyard to search any Phantom Knights card from your deck to your hand except itself. So this is a card that can be easily searched and then searches the rest of the archetype. That's great! However, both effects can only be activated once per turn. You can't boost multiple monsters and you can't search multiple cards with Ancient Cloak. Still worth running 3 in Phantom Knights, and it is still a bridge to do Monarch shenanigans if you're in the mood. 
 
Score: 3.5/5 
Art: 3/5 Reminds me of Resonators. 
 
-WarlockBlitz