oppai boost box One Piece: A Fist of Divine Speed Booster (OP11) – Mystic TCG 10 Super Rares Gift Box - Oppai Mousepad

For a blue mana, you can create a copy of this and target something else

You can only use this effect of "Candy Cane Man" once per turn

You can only use this effect of "Traptrix Genlisea" once per turn

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Also, an honorable mention goes to Abeyance, which doesn't look like much today, but its original wording basically made it a mono-blue Time Walk back in 1997

Creature Emberheart Challenger Haste Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Valiant Whenever this creature becomes the target of a spell or ability you control for the first time each turn, exile the top card of your library