"Magic Origins", +=0 (9)
Defender (This creature can't attack.)
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.
: Draw a card, then discard a card. If there are five or more cards in your graveyard, exile Jace, Vryn's Prodigy, then return him to the battlefield transformed under his owner's control.
Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.
Flash (You may cast this spell any time you could cast an instant.)
When Nivix Barrier enters, target attacking creature gets -4/-0 until end of turn.
Flying
Revenant's power and toughness are each equal to the number of creature cards in your graveyard.
: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Zendikar Incarnate's power is equal to the number of lands you control.
Gatherer works better in the Companion app!
, 
: Put a +1/+1 counter on Hangarback Walker.