Hangarback Walker Combos
Hangarback Walker + Enduring Renewal
Mortuary + Experimental Frenzy + Hangarback Walker
Yedora, Grave Gardener + Primordial Mist + Hangarback Walker
The Reality Chip + Mortuary + Hangarback Walker
Teshar, Ancestor's Apostle + Salvager of Ruin + Hangarback Walker
Mortuary + Vizier of the Menagerie + Hangarback Walker
Mortuary + Vivien, Monsters' Advocate + Hangarback Walker
Mortuary + Realmwalker + Hangarback Walker
Mortuary + Ranger Class + Hangarback Walker
Mortuary + Mystic Forge + Hangarback Walker
Mortuary + Garruk's Horde + Hangarback Walker
Bolas's Citadel + Mortuary + Hangarback Walker
Mortuary + Amareth, the Lustrous + Hangarback Walker
Luminous Broodmoth + Hangarback Walker + Solemnity
Emry, Lurker of the Loch + Intruder Alarm + Hangarback Walker
Colfenor, the Last Yew + Sifter of Skulls + Hangarback Walker
Colfenor, the Last Yew + Pawn of Ulamog + Hangarback Walker
Colfenor, the Last Yew + Hangarback Walker + Ashnod's Altar
Combo result
Infinite ETB. Infinite LTB. Infinite colorless mana. Return any number of creatures from your graveyard to your hand. Infinite creature tokens with flying. Infinite storm count. Infinite sacrifice triggers. Infinite death triggers.
Prerequisites
All permanents on the battlefield. Hangarback Walker has at least one +1/+1 counter on it.