Time Spiral Timeshifted

Leviathan

Trample
Leviathan comes into play 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.

Trample
Leviathan enters 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.)

Beatdown Box Set

Trample
Leviathan comes into play 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.

Fifth Edition

Trample
Leviathan comes into play tapped and does not untap during your untap phase.
Leviathan cannot attack this turn unless you sacrifice two islands.
Sacrifice two islands: Untap Leviathan. Use this ability only during your upkeep.

Renaissance

Fourth Edition Foreign Black Border

Fourth Edition

Trample
Comes into play tapped and does not untap during your untap phase.
During your upkeep, you may sacrifice two islands to untap Leviathan.
Leviathan cannot attack unless you sacrifice two islands during your attack.

The Dark

Trample
Leviathan comes into play tapped, and does not untap as normal during your untap phase.
Sacrifice two islands during your upkeep phase to untap Leviathan.
Leviathan may not attack unless you sacrifice two islands during your attack.