Instakill is widely regarded as a bad design mechanic in EtG.
1-card instakill is. 2-card instakill is acceptable.
Despite having restrictions, technically they are still 1-card instakills.
More importantly, these cards care about the HP of the creature they're instantly killing.
This is why this card, what I'd call the standard of all CC, isn't considered instant kill. Even though it does just that.
