magma opus Tap Dealing Damage
Magma Opus Tap ability dealing damage to the permanents it is tapping as well as the targets it is dealing 4 damage to. Happened when I cast it on multiple occasions.
Happened to me also - you can see some really bizarre behavior happening when the card's being cast in both games 1 and 3 in event #247522717.
It appears the tap targets are being randomly assigned some quantity of damage, between 0 and some really crazy numbers (33 seemed common from our games - though you'll also see in game 1 the lands appear to be targeted for some really gratuitous quantities of damage)
Happen to me in a league