Consign to Memory
Instant
Replicate 
Counter target triggered ability or colorless spell.
He wept not for what was, but what could never be.
Ben Hill
Modern Horizons 3 (MH3)
• #54Rulings
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.
(wotc • 2024-06-07)
Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keywords (such as prowess) are triggered abilities and will use "when," "whenever," or "at" in their reminder text.
(wotc • 2024-06-07)
Rulings
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.
(wotc • 2024-06-07)
Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keywords (such as prowess) are triggered abilities and will use "when," "whenever," or "at" in their reminder text.
(wotc • 2024-06-07)