Dreadhorde, hability check doesn't trigger correctly
Dreadhorde hability should trigger always and select the spell when reach it's turn on the pile.
Example: Dreadhorde is equiped with Two-handed axe. Thirll of possibility on graveyard. When creature attack, both trigger appears to be ordered, but as there is no instant/sorcery with lesser or equal manacost, Dreadhorde effect gets canceled and then, Two-handed axe triggers effectivelly increasing its attack.
What should happens: The same behabiour as Barrowin of Clan Undurr, First triggers, and when its its turn on the pile, ability resolves if able.
-
[Deleted User] commented
This won't work as Dreadhorde Arcanist needs to target a card when its ability goes on the stack. Two-Handed Axe's attack trigger won't have resolved so its power won't be increased before you have to choose a target.