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Describe the Bug:
AI didn't use Laccolith Grunt ability in few games so maybe there is a bug.AI didn't use Laccolith Grunt's ability even if Laccolith Grunt will die without dealing lethal combat damage to it's blocker and (that makes me more suspicious of AI's inability).

Which card did behave improperly?
Laccolith Grunt AI

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink 2016/08/27: Eldritch Moon v2, duel

What exactly should be the correct behavior/interaction?
AI can use Laccolith Grunt's ability especially if Laccolith Grunt will die in combat without dealing lethal damage to blocker.Ideally AI will prefer to use ability in order to kill a more valuable or more dangerous to AI creature.

Are any other cards possibly affected by this bug?
Possibly all Laccoliths, Laccolith Warrior, Laccolith Titan, Laccolith Whelp and Laccolith Rig.

I was able to make it trigger, but the player target must be killed in order to activate it (which seems reasonable on AI standards).

In the savegame provided, you need to activate the Goblin Diplomat ability to force AI to attack and defend with a creature that might kill it (the Lacolith Whelp), AI will use it to kill the Goblin Diplomat (which seems quite fitting to the situation)

On the other hand, while testing it numerous times, I got a bug that I could reproduce only once, same moves as above with several defenders, the AI Lacolith Whelp didn't die and an empty legacy effect popped on it.

This has already been fixed in current dev now closed.