Tide-Caller Mira

Whenever an island enters the under your battlefield put a +1/+1 on Tide-Caller Mira.
Sacrifice three islands: reveal the top four cards
of your library, you may put any number of lands revealed this way onto the battlefield tapped
under your control, put the rest into your hand.
{u}{g}, remove a +1/+1 counter from Mira: return
target land card you control to your hand.