Oponn's Fickle Favor

Enchant creature
Enchanted creature gains "{2}: Flip a coin. If you
win the flip, put two +1/+1 counters on this
creature. If you lose the flip, Oponn's Fickle
Favor deals 4 damage to this creature."
"Kneel then in the cup of your god's hand. But be
warned. They might simply squeeze. Call it the predilection towards curiosity."
—Gothos, Gothos' Folly