Val, Prince of Atlanta

Islandwalk
Whenever one or more Merfolk you control deal combat damage to a player, put a +1/+1 counter
on another target Merfolk you control.
{g}{w}{u}, {t}: Sacrifice a Merfolk with a +1/+1 counter on it, Create X tapped 1/1 blue Merfolk creature tokens, where X is the sacrificed
Merfolk's power.