Dynaheir, Invoker Adept + Grim Monolith + Pemmin's Aura + Chromatic Orrery

Dynaheir, Invoker Adept

Grim Monolith

Pemmin's Aura

Chromatic Orrery

How it works

1. Activate Chromatic Orrery's first ability by tapping it, adding 5.
2. Activate Grim Monolith's first ability by tapping it, adding 3.
3. Activate Dynaheir by tapping it, copying the next ability that you activate that costs at least four mana this turn.
4. Activate Grim Monolith's second ability by paying 4.
5. Dynaheir triggers, copying Grim Monolith's ability.
6. Resolve the copy of Grim Monolith's ability, untapping it.
7. Activate Grim Monolith's first ability by tapping it, adding 3.
8. Resolve Grim Monolith's ability from step 4, untapping it.
9. Activate Pemmin's Aura's first ability by paying 1, untapping Dynaheir.
10. Repeat from step 2.