Leviathan from Timeshifted
Leviathan from Timeshifted

Creature — Leviathan   {5}{U}{U}{U}{U} (CMC:9)

Trample Leviathan enters the battlefield tapped and doesn't untap during your untap step. At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan. Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

23 TSB • ENMark Tedin

Legal in: Modern,Time Spiral Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

View this MTG card on Gatherer
You don't have to pay the untap cost if it is untapped outside the upkeep phase or is untapped by an effect.

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