japanese one piece card game Trading - Awakening of the New Era - OP-05 - Booster Box entirely in Japanese One Piece Card Game 2nd

Avoiding permanents is probably the easiest way to meet the restriction since playing a deck with a bunch of creatures while also ensuring each has an activated ability seems difficult

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The ability to sacrifice a creature to recur a creature is just powerful

Theros obviously had an enchantment theme

Once a spell or ability starts resolving and says investigate, the Clue token is made right away, and its too late to respond

in this case, the ability to produce much more mana under the right circumstances