The wording on "sacrifice" in the FAQ is giving me problems. Basically the FAQ reads that you can't pull any fancy shenanigans to try and get around your unit leaving play ("dying", as imprecise as that term is)
"Sacrifice (v1.7)
Sacrifice means to remove a card you control from play. The act of sacrificing a card cannot be cancelled or prevented by other effects. After a card is sacrificed, it is placed into its owner’s discard pile."
The act of sacrificing cannot be cancelled or prevented, but can you put a sacrificed card onto the Unending Horde?
Unending Horde says:
"If your [Orc] unit would leave play, you can attach it to this card instead (it is not considered to be in play).
Action: Spend X resources to put all [Orc] units attached to this card into play in your battlefield. X is the total printed cost of attached cards. (Limit once per turn.)"
So, in my mind you can play, say, You's Bigga to sacrifice a Baby Squig, then put the Baby Squig on the Unending Horde. The Baby Squig is still sacrificed in that you killed it to make You's Bigga have an effect, and it still leaves play as the Unending Horde says it is not considered to be in play.
I keep thinking this has been talked about on these forums… Thoughts?