Help needed with custom card script

[qwertyuiop265000]

So I need help with this card. You see, it's supposed to let me gqin control of any creature it deals combat damage to, but it just... doesn't? Help me!

Name:The Corruption
ManaCost:W U B R G C
Types:Creature Horror
PT:2/1
K:Echo:3
K:CARDNAME must be blocked if able.
T:Mode$ DamageDone | ValidSource$ Card.Self | ValidTarget$ Creature | CombatDamage$ True | TriggerZones$ Battlefield | Execute$ DBGainControl | Execute$ DBCopy | TriggerDescription$ Whenever CARDNAME deals combat damage to a creature, create a token copy of The Corruption and gain control of the defending creature (if it's still alive, of course.)
SVar:DBGainControl:DB$ GainControl | Defined$ TriggeredTargetLKI | NewController$ You
SVar:DBCopy:DB$ CopyPermanent | Defined$ Self | NumCopies$ 1
S:Mode$ Continuous | Affected$ Card.Self | AddPower$ X | AddToughness$ X | TriggerDescription$ The Corruption gets +1/+1 for each other creature named The Corruption.
SVar:X:Count$Valid Creature.namedThe Corruption+Other
SVar:BuffedBy:Creature.namedThe Corruption
SVar:PlayMain1:TRUE
Oracle:Whenever The Corruption deals combat damage to a creature, create a token copy of The Corruption. Gain control of the defending creature. The Corruption gets +1/+1 for each other creature named The Corruption.

[lyly19]

It looks like the problem is with how you reference the GainControl target. You're using TriggeredTargetLKI, but you may want to replace it with TriggeredTarget to ensure you can still control the creature even if it survives combat.

Try replacing the line:
SVar:DBGainControl:DB$ GainControl | Defined$ TriggeredTargetLKI | NewController$ You

with:
SVar:DBGainControl:DB$ GainControl | Defined$ TriggeredTarget | NewController$ You

If it still doesn't work, check if TriggerZones$ Battlefield needs to be modified, as sometimes a creature can be destroyed before the effect can be applied.