Qm said

[MaxWilson]

Note that it's not 10 + (size*2) AP. It's 10 + ((size of attacker - size of defender)*2) AP. That means an elephant will usually have an 18 AP attack, which is survivable by tough Ulmish guys, as you noted.

About the minimum 1 damage: I thought so at one point too, so I specifically paid attention to IIRC a PD commander when he was getting trampled. No Ethereal, no Luck, and it was definitely the same guy. No damage. It's hard to tell exactly how much damage is taken during a trample because of the displacement, so I don't know how common it is to be undamaged, but I know it happens.

-Max