Bloatfly Swarm (Surge Foil) [Fallout] Tiefling Warlock −5: Exchange control of target

−5: Exchange control of target artifact or creature you control and target creature an opponent controls with power 3 or less

put a +1/+1 counter on K'rrik

but use your booster pile rather than your library

But according to my calculations

Bloatfly Swarm (Surge Foil) [Fallout] Tiefling Warlock −5: Exchange control of targetSet: Fallout Type: Creature Insect Mutant Rarity: Uncommon Cost: {3}{B} Flying Bloatfly Swarm enters the battlefield with five +1 +1 counters on it. If damage would be dealt to Bloatfly Swarm while it has a +1 +1 counter on it, prevent that damage, remove that many +1 +1 counters from then give each player a rad counter for each +1 +1 counter removed this way.