Shielding the Tyrant

Until end of turn, spells and abilities you control that would add colored mana instead add that much white mana. Until end of turn, you may spend white mana as though it were mana of any color. Draw a card.

Changeling (This card is every creature type.) Creatures target player controls get +0/+1 and gain all creature types until end of turn.

Flying, haste When Karrthus enters, gain control of all Dragons, then untap all Dragons. Other Dragon creatures you control have haste.