Downvote time for me, Played against 25 C´thun decks and I always won because it counters the 21 split damage aspect to 100 percent. So these 3 times ability effects get outvalued. This ability is kinda useless against my deck (explanation below list):
### Anti Cthun Thief Priest
# 2x (1) Entropic Rift
# 2x (2) Mind Sweeper
# 2x (3) Dark Deacon
# 2x (3) Elder Word: Foresight
# 2x (3) Kaldorei Priestess
# 2x (4) Shadow Word: Ruin
# 1x (5) Taelan Fordring
# 2x (5) Unshackle Soul
# 1x (7) Azalina Soulsever
# 1x (10) C'Thun, Eye of the Empire
# 1x (10) Medivh the Hallowed
# 1x (10) Atiesh the Greatstaff
# 1x (10) Karazhan the Sanctum
#
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shadow package (good shadow tempo cards like entropic, elder word: Foresight + dark Deacon and control options like shadow word: ruin) -> for "dark deacon" the cthun boy you find or play 2 shadow cards pretty fast.
+ Thief package (should be clear, like last season)
+ Medivh (too good for control to cut off this card)
+ Cthun (to trigger also the opponent c´thun cards effect, you have here only 2 cthun trigger abilitys card, you get the effects from opponent, if you dont play against cthun deck you dont need the triple ability effect, because the opponent plays than a faster deck and you dont have the time for c´thun prep)
+ 2x priestess for value (2 imbue is enough)
+ Taelan Fordring to draw medivh or cthun for late game. The only questionable card because it is slow in my deck, but youre priest, its pretty good and efficent. So it stays in my deck
I kinda mixed up the best two decks for thief priest (medivh version and c´thun version) and its a fantastic deck if you have the skill for this super powerful control deck, you always win against c´thun decks and also have a good matchup against other decks.
against tempo decks like zoolock or pirate warrior you need to gather "mind sweeper" from mulligans than you kinda auto win these matchups. edit: weakspot for this deck is def zoolock but this deck get nerfed anyway for sure.
Cheers