Card

Rootha, Mercurial Artist

Mana cost {1}{U}{R}

{2}, Return Rootha to its owner's hand: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

Part of 148 known combos, 6 of them two-card. 1 official ruling.

Bracket

B1 Exhibition — Not in the same deck as its two-card combo partners: Expansion // Explosion, Increasing Vengeance, Reverberate, Twincast, Refuse // Cooperate, Fork
B2 Core — Not in the same deck as its two-card combo partners: Expansion // Explosion, Increasing Vengeance, Reverberate, Twincast, Refuse // Cooperate, Fork
B3 Upgraded — allowed: Its two-card combos are not early, which Bracket 3 allows
B4 Optimized — allowed: No restriction beyond the banned list
B5 cEDH — allowed: No restriction beyond the banned list

Two-card combo with Expansion // Explosion, Increasing Vengeance, Reverberate, Twincast, Refuse // Cooperate, Fork (none of them early)

Bracket: Lotus Vault analysis, with Commander Spellbook flags

148 known combos, 6 of them two-card.

2021-04-16 · Wizards of the Coast
Rootha, Mercurial Artist's ability must have a target to be activated. You can't activate it without a target in order to return Rootha to your hand.

Rulings: Scryfall · Wizards of the Coast