Sol

When Sol enters the battlefield, sacrifice it unless
you pay {1}.
{t}: Add {w}{w}, {r}{r}, or {w}{r} to your mana pool.
{t}: Sol deals 1 damage to target player, that
player also gets a sunburn counter. (Counter the
first spell a sunburned player casts each turn unless its controller pays {x}, where X is the number of sunburn counters that player has.)