Percy Jackson

Vigilance, FirstStrike, Islandwalk
When Percy Jackson enters the battlefield
under your control untap all blue land and put a
+1/+1 counter on each blue creature you control.
{x}{t}: Untap all blue land, {x} target blue
land cards become 3/4 water elementals with
trample until the end of the turn.
{2}{u}: Target creature taps and doesn't untap on
the opponents next untap step.