In Japan (OCG), this card was limited to 1 with an
errata (ruling changes).
These are the following changes to the card:
You can only use each effect of "Temple of the
Kings" once per turn.
You can only activate 1 Trap card you control during
the same turn you set it (instead of being able to
use this effect any number of times).
For the 2nd effect, you can only summon
Fusion Monsters from the Extra Deck – No Syncrho,
XYZ or Pendulums
Temple of the Kings
I agree it needed a nerf and that using it
infinitely to thin through your deck is just
abusive, but it was nerfed a bit too much.
Maybe a better compromise would've been to
limit it's effect to 2 or 3 times per turn.
Maybe there might be some good combos with the card
It's a -1 to use up a card just to activate a trap
sooner, but maybe if there's a trap you really
benefit from activating sooner (and you deck is able
to use this method each turn) it could work.
With regard to the second effect, about Mystical
Beast Serket, you might be able to win locals with
it as a fun deck with some inventive combo you
discover, but it's just not consistent for
competitive play since you have to have two
different cards on the field at the same time.
Traditional, Before Errata – 4/5 (It fueled an FTK)
Traditional, After Errata – 1/5 (It's useless, and a
Advanced, with Errata – 2/5 (May have some use but
is a -1)
Advanced, if not Errata'd – 5/5 (FTK in Advanced –
no thank you)