Vodalian War Machine
{1}{U}{U}
Creature -- Wall
0/4
Defender (~this~ can't attack.)
Tap an untapped Merfolk you control: ~this~ can attack this turn as though it didn't have defender.
Tap an untapped Merfolk you control: ~this~ gets +2/+1 until end of turn.
When ~this~ dies, destroy all Merfolk tapped this turn to pay for its abilities.