Opponent is warrior, playing C'thun. I am priest, playing control.
I play entomb on his Ancient Shieldbearer. His C'thun is a 22/22. I do not have a C'thun, and I have not entombed or taken control of a C'thun at any point in the game. However, I have played two C'thun buff cards during the game (thoughtsteal & the 4/3 deathrattle guy). I get the armor bonus when I play the Ancient Shieldbearer, even though I have no C'thun.
Intended? I'm not sure how far reaching C'thun buffs go if he's not in the deck to begin with.
This post was edited by Canadian_Man on Apr 29 2016 06:32pm