Mischievous Quanar + Radiate Combos

Combo 1 with Word of Seizing

Steps

1. Cast the additional instant or sorcery by paying its mana cost, targeting a single target.
2. Holding priority, cast Radiate by paying {3}{R}{R}, targeting that instant or sorcery.
3. Holding priority, cast Word of Seizing by paying {3}{R}{R}, targeting any permanent.
4. Holding priority, activate Mischievous Quanar's morph ability by paying {1}{U}{U}, turning it face-up.
5. Mischievous Quanar triggers, copying Radiate, targeting Word of Seizing.
6. Resolve the copy of Radiate, creating a copy of Word of Seizing targeting each other permanent.
7. Resolve all Word of Seizings, causing you to gain control of all permanents on the battlefield, and give them all haste until end of turn.