Untap, Draw, Play Winter Orb, Attack with the Knight & Elemental.
After Attack - regardless of your actions, I'll play Mahamoti Djinn and be done.
During your upkeep step, I'll tap the land you untap.
Spiderman: 11 (5?)
Library: 39
Hand: 2
In Play:
(T,T,U) Mt x3
(T,T,T) Swamp x3
(U)
Dwarven Warriors (1/1, T: Target creature with power 2 or less is unblockable)
Graveyard: Fire Elemental, Shivan Dragon, Roc of Kher Keep, Nightmare, Terror, Demonic Hordes, Drain Life, Frozen Shade, Stone Rain, Disintegrate, Drudge Skeletons
Removed from Game:
BigBlue: 16
Library: 39
Hand: 2
In Play:
(U) Winter Orb (As long as ~ is untapped, players can't untap more than one land during their untap steps.)
(T) Mox Sapphire (T:U)
(T) Mox Jet (T:B)
(UUUUU) Island x5
(UU) Swamp x2
(U) Icy Manipulator (1,T:Tap Target Artifact, Land, or Creature)
(UU) Prodigal Sorcerer (1/1; T: Deal 1 Dmg to Target Creature or Player) x2
(T) Black Knight (2/2; First Strike; Protection from White)
(T) Air Elemental (4/4; Flying)
(U) Wall of Bone (1/4; Defender; B:Regenerate ~) (Enchanted with Control Magic)
Graveyard: Power Sink, Counterspell
Removed from Game: Sengir Vampire