Queen Rufilla's Domain

This land comes in tapped.
Create a 1/1 blue merfolk with Islandfall at the end of your turn. (islandfall- merfolk creatures you control gain +1/+1 until end of your turn.)
{8}{t}: Sacrifice all merfolk tokens you control and create X 4/5 merfolk Warrior Tokens with Islandfall where X is one third of the merfolk sacrificed rounded up.