Name a small text change to a champs ability or passive that would make them op
I'll start with some examples.
Her tentacle heal changed from healing off hitting champions to healing off hitting any enemy unit.
R hits all enemy units(that means enemy minions as well).
R resets and increases duration on any enemy unit kill instead of only champion kills.
Annie's next offensive spell will stun the target for eternity
Braum adds stacks of Concussive Blows to enemies with basic attacks or Winter's Bite. He and his allies continue to add stacks with basic attacks, at 1 stack their target will be stunned
roots a target on every auto with no cooldown from the current cooldown.