A copy of a spell can be countered like any other spell, but it must be countered individually. Countering a spell with replicate won't affect the copies.
2026-01-27
If either target is an illegal target as Super Combo resolves, the creature you control won't deal damage due to the effect of that copy of Super Combo.
Replicate (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)
Target creature you control deals damage equal to its power to target creature an opponent controls.
(When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)