Deadrift Cascade

Deadrift Cascade enters the battlefield tapped.
When Deadrift Cascade enters the battlefield, return a land you control to your hand. If the land returned to your hand this way was an island, draw a card, then discard a card.
{t}: Add {1}{u} to your mana pool. Draw a card, then discard a card.
{t}: Draw a card.
When Deadrift Cascade leaves the battlefield, Discard a card.