Riku of Two Reflections

If the copied spell has {X} in its mana cost, the value of X is copied.

Each time the first ability triggers, you can pay {U}{R} only one time to get one copy of the spell. Each time the second ability triggers, you can pay {G}{U} only one time to get one token.

As the token is created, it checks the printed values of the creature it's copying, as well as any copy effects that have been applied to it.

If the spell that caused Riku's first ability to trigger has left the stack by the time the ability resolves, you can still pay {U}{R}. If you do, you'll copy the spell as it last existed on the stack.

You can't pay any additional costs for the copy. However, effects based on any additional costs paid for the original spell are copied as though those same costs were paid for the copy. Notably, if the original spell was kicked (or kicked a certain number of times), the copy will also be kicked (or kicked that many times).

Riku's first ability triggers whenever you cast any instant or sorcery spell, regardless of whether that spell has targets.