As Indominus Rex, Alpha enters the battlefield, discard any number of creature cards. It enters with a flying (This creature can't be blocked except by creatures with flying or reach.) counter on it if a card discarded this way has flying (This creature can't be blocked except by creatures with flying or reach.). The same is true for first strike (This creature deals combat damage before creatures without first strike.), double strike (This creature deals both first-strike and regular combat damage.), deathtouch (Any amount of damage this deals to a creature is enough to destroy it.), hexproof (This permanent can't be the target of spells or abilities your opponents control.), haste (This creature can attack, and as soon as it comes under your control.), indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.), lifelink (Damage dealt by the creature also causes its controller to gain that much life.), menace (This creature can't be blocked except by two or more creatures.), reach (This creature can block creatures with flying.), trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.), and vigilance (Attacking doesn't cause this creature to tap.). When Indominus Rex enters the battlefield, draw a card for each counter on it.