WUBRG Ultimatum

As an additional cost to this spell, pay {u/r}{r/w}. This spell's mana value is 10.
Create a 2/2 white Knight creature token for every {w} spent to cast this spell, draw a card for every {u} spent to cast this spell, each opponent discards a card for every {b} spent to cast this spell, deal 2 damage to any target for each {r} spent to cast this spell, and put a +1/+1 counter on each creature you control for every {g} spent to cast this spell.