Since my opponent last night didn't report these, looks like I"ll have to.

Playing last night I cast "horns to hide" on my opponent's creature, and they responded with Negate. The creature then dissapeared. I don't believe it returned to their hand, as I don't remember them casting it again.

Upset at the first game changing bug, we played again. This time they claimed that sinkhole didn't work correctly. Their completed building was sacrificed, but my building was not destroyed.

A couple items to look in to anyways.

I'm sure that he casted negate on creature instead horns to hide and creature also was able to be negated.

negate ONLY targets entities, so this is the expected action. at least he got the flux cost back

So I take it only figures are "entities" then? So spells and enchantments cannot be negated? Are there any other cards that use the "entity" nomenclature, or should the description of Negate be rewritten to clarify this a bit perhaps?

Entity is any Creature, Building or Enchantment. It is anything that sicks around for more than one action.

I'm guessing that the player negated the creature instead of holding down shift to get to the enchantment card. The alternative would have been a popup that asked which to negate. I agree that this adds a minor learning curve but also makes play much smoother.. I'd write it off as a learning experience and be done with it, personally....

well, chalk me under the guys who mistakenly negated his own unit because it was entangled. I don't suppose it's possible to default selection to the most recent thing on the hex? I doubt I'll make the same mistake again as it lost me a game, but still