Hangarback Walker [Kaladesh Inventions]Set: Kaladesh Inventions Type: Artifact Creature Construct Rarity: Mythic Cost: {X}{X} Hangarback Walker enters the battlefield 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. {1}, {T}: Put a +1 +1 counter on Hangarback Walker.

We must understand it

Set: Alpha Edition Type: Enchantment Rarity: Rare Cost: {1}{W} If you would draw a card during your draw step

Set: Amonkhet Prerelease Promos Type: Creature — Demon Rarity: Rare Cost: {3}{B}{B} Flying

Take an extra turn after this one

If you would begin your turn while Time Vault is tapped

Set: Champs and States Type: Creature — Human Knight Rarity: Rare Cost: {R}{R} First strike

Set: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft — {T}: Add one mana of any color

Sphinx spells you cast cost {2} less to cast

Set: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {1}{U}{U} Buyback—Discard two cards

It has "This creature's power and toughness are each equal to your life total

Set: Alpha Edition Type: Enchantment — Aura Rarity: Uncommon Cost: {W} Enchant creature

It blocks each attacking creature this turn if able