Something in the vein of Sigrda’s permanent hexproof here, possibly the same cause/fix.
Graf harvest’s first ability states “when this support is in play” which means to me it is a constant state-checking ability, and not a permanent one-time buff.
Well, was playing Kiora, and stole diregraf, and had a blisterpod and scion in play (giving me three creatures with defender) and my opponent’s zombies still had unblockable, costing me an event match.
The bug isn’t with graf harvest. The bug is with the menace mechanic. Menace in this game is simply unblockable in its current state. I honestly don’t think they bothered to code menace into the game. They probably simply copy pasted unblockable code into menace function to make it look like they added a mechanic. I have yet to see a single menace creature that can be blocked even if you have 3 defenders or 3 reach out.
Happened to me just now. Had 2 defenders(Wild-Field Scarecrow and Epitaph Golem) and gave my third unit Reach(Unit: Conclave Naturalists, Spell: Mantle of Webs) and the enemy zombies were still unblockable.
The effect Graf harvest gives is menace. That’s the problem. It gives all your zombies menace. I don’t really know why it actually says everything instead of stating zombies you control gain menace, but the bug isn’t with graf harvest, but rather that menace is broken.