SwampShroom Titan

Swampwalk, Forestwalk, Islandwalk
{1}{b}{g}{u}: Sacrifice Swampshroom Titan, then return it to the battlefield at the beginning of the next end step tapped. Activate this ability only as a sorcery.
If you control a Swamp, Forest, and Island when this creatures enters the battlefield, draw a card, gain 2 life, and target opponent discards a card.