Bonecrusher giant bug
Bonecrusher Giant not being destroyed by Heartless Act after being given perpetual haste by another creature (Not sure of the name but I have the log). As far as I'm aware, Perpetual is not a counter? MTG rules say the card is "rewritten" to include the new effects. Heartless Act allowed me to select the "destroy creature with no counters" option when targeting the Bonecrusher Giant, I was dealt the 2 damage as usual, then the creature remained on the battlefield. There were no other effects, just a Heartless Act in the GY and a very much alive Bonecrusher after the 2 damage had been dealt. If this is not a bug, perhaps a rewrite of how perpetuality works is in order.