Banisher Priest

Whenever a player taps a nonbasic land for mana, this enchantment deals 1 damage to that player.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever this creature attacks, you may exile target creature defending player controls until this creature leaves the battlefield. (That creature returns under its owner's control.)

Flying Vigilance (Attacking doesn't cause this creature to tap.)

This creature enters with X +1/+1 counters on it, where X is the amount of life you've gained this turn.

If a red instant or sorcery spell you control or a red planeswalker you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead.

Indestructible (Effects that say "destroy" don't destroy this artifact.) T: Add one mana of any color.