Playing arena on iphone.
1. attacing with 2 heros, each has an equipment on it that gives +2/+3 and has tremple. My opponent blocked with 2 2/2 cats. For some reason, all 4 cats died.

1. I had the FF black creature with the ability (whenever one of the creature or equipment you control dies, you get 1 life and the opponent lose 1 life). I played a sorcecry that creates 3/3 blue robot and then played it again from the graveyard (flashback). The creature ability triggered 3 times.