Eldrazi Indiscrimination

You may cast colorless Eldrazi creature spells of converted mana cost 7 or less as though they had flash.
Whenever a colorless Eldrazi creature you control deals combat damage to a creature an opponent controls, that opponent's creature becomes a 1/1 colorless Eldrazi Scion, loses all abilities, and has "Sacrifice this creature: Add {c} to your mana pool."