Played in the meta
Most-played 【Once per Turn】 cards in GD04 meta decks.
Cards with Once per Turn
70 total
How 【Once per Turn】 works
An effect marked 【Once per Turn】 can be used once each turn — the limit resets when the next turn begins. The limit belongs to that card's effect: a second copy of the same card on the field brings its own once-per-turn allowance.
It appears on effects that would be degenerate if repeatable — loops, big stat swings, repeatable removal. When evaluating such a card, price it as one activation per turn cycle, not as an engine.