Alpaxers Ruins

When Alpaxers Ruins enters the battlefield Exile {x} cards
from your oponents battlefeild.
{t}Add: {b} or {r} to your battlefeild.
If you chose {b} deal damage equal to the number
of {b} In your mana pool.If you chose {r} summon
1/1 goblin tokens with Haste equal to the number
of {r} in your battlefeild.