Name:Tranquilize
ManaCost:1 U
Types:Sorcery
A:SP$ Tap | ValidTgts$ Creature.OppCtrl | SubAbility$ DBCounter | TgtPrompt$ Select target creature an opponent controls. | SpellDescription$ Tap target creature an opponent controls and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
SVar:DBCounter:DB$ PutCounter | Defined$ Targeted | CounterType$ Stun | CounterNum$ 3
DeckHas:Ability$Counters
Oracle:Tap target creature an opponent controls and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)