Hangarback Walker enters with X +1/+1 counters on it.When Hangarback Walker dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker., : Put a +1/+1 counter on Hangarback Walker.
Whenever a Dragon you control enters, put a gold counter on Dragon's Hoard., Remove a gold counter from Dragon's Hoard: Draw a card.: Add one mana of any color.
Enchant creatureWhen Sage's Reverie enters, draw a card for each Aura you control that's attached to a creature.Enchanted creature gets +1/+1 for each Aura you control that's attached to a creature.
+1: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls.0: Until end of turn, Gideon, Champion of Justice becomes a Human Soldier creature with power and toughness each equal to the number of loyalty counters on him and gains indestructible. He's still a planeswalker. Prevent all damage that would be dealt to...
TrampleWhenever Primeval Herald enters or attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
