Untap, upkeep, draw.
Finally!
I'll pay GRR for Thunderblade Charge (1RR; Sorcery; ~ deals 3 damage to target creature or player. Whenever one or more creatures you control deal combat damage to a player, if ~ is in your graveyard, you may pay 2RRR. If you do, you may cast it without paying its mana cost.), targeting the Commander.
Response?
Rokapoke: 6
Hand: 3
Library: 10
Battlefield:
(TTUUU) Mountain x5
(TUUUUU) Forest x6
(U) Wild Nacatl (1/1; Cat Warrior; ~ gets +1/+1 as long as you control a Mountain. ~ gets +1/+1 as long as you control a Plains.) ** Gaseous **
(T) Prodigal Pyromancer (1/1; Human Wizard; T: ~ deals 1 damage to target creature or player.)
Graveyard: Anaba Shaman, Sandstorm, Ranger's Guile, Beastbreaker of Bala Ged, Nantuko Shaman, Lowland Basilisk, Bloodpyre Elemental, Pitchburn Devils, Prodigal Pyromancer, Nessian Courser, Simoon, Earthbrawn, Fiery Temper, Thunderblade Charge
Exile:
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Melkor: 6
Hand: 1
Library: 9
Battlefield:
(U) (U) (U) (U) (U) (U) Plains x6
(U) (U) (U) (U) Island x4
Humility (Each creature loses all abilities and is a 1/1 creature)
Gaseous Form enchanting Wild Nacatl
(U) Coralhelm Commander (2/2, Level Up 1, Level 2-3 3/3, Flying, Level 4+ 4/4, Flying)
Graveyard: Time Ebb, Tundra Wolves, Soltari Trooper, Minister of Impediments, Ward of Lights, Whip-Spine Drake, Shinewend, Belltower Sphinx, Jodah's Avenger, Watchwing Scarecrow, Revered Dead, Sage Owl, Soltari Emissary, Thornwind Faeries, Blade of the Sixth Pride, Anoint, Riftmarked Knight
Exile: