Coral Merfolk

Target player loses 4 life and you gain 4 life.

Whenever this creature attacks, you may tap target creature.

Enchant creature Enchanted creature gets +2/+1.

You may tap or untap target artifact, creature, or land.

Enchant creature Enchanted creature gets +1/+2.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

Defender (This creature can't attack.)

You have no maximum hand size.