{1}{U}, {T}: Untap target artifact an opponent controls and gain control of it until end of turn. It gains haste until end of turn. When you lose control of the artifact, tap it.
Marjhan doesn't untap during your untap step. {U}{U}, Sacrifice a creature: Untap Marjhan. Activate only during your upkeep. Marjhan can't attack unless defending player controls an Island. {U}{U}: Marjhan gets -1/-0 until end of turn and deals 1 damage to target attacking creature without flying. When you control no Islands, sacrifice Marjhan.
Cumulative upkeep {1} {T}: Put a music counter on target creature. If it doesn't have "At the beginning of your upkeep, destroy this creature unless you pay {1} for each music counter on it," it gains that ability.
Flying {T}: Target creature you control with toughness 2 or less gets +1/+1 and gains flying until end of turn. When Phantasmal Mount leaves the battlefield this turn, sacrifice that creature. When the creature leaves the battlefield this turn, sacrifice Phantasmal Mount.
Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle. Draw a card at the beginning of the next turn's upkeep.
Untap target creature an opponent controls and gain control of it until end of turn. That creature gains haste until end of turn. When you lose control of the creature, tap it.
"It rose above our heads, above the ship, and still higher yet. No foggy, ice-laden sea in the world could frighten me more." —General Jarkeld, the Arctic Fox
Flying {U}, Exile the top card of your library: Tap target creature with flying. {U}, Exile the top card of your library: If the exiled card is a snow land, Storm Elemental gets +1/+1 until end of turn.
Cumulative upkeep—Exile the top card of your library. When a player doesn't pay Thought Lash's cumulative upkeep, that player exiles all cards from their library. Exile the top card of your library: Prevent the next 1 damage that would be dealt to you this turn.
Defender Flying {U}: Thunder Wall gets +1/+1 until end of turn.
"The lemures had barely taken wing when the sky roared with thunder. The swarm of little beasts wavered, divided, and fell, crashing to the earth." —General Jarkeld, the Arctic Fox
{T}, Sacrifice a creature and a Swamp: Destroy target nonartifact creature. It can't be regenerated. {T}, Sacrifice a creature and a snow Swamp: Destroy target creature. It can't be regenerated.
Not all of Terisiare's flooding was natural . . . .
"To visit the sky requires bravery, and thought, and little else. To master the sky requires the binding of its masters, and little else." —Arnjlot Olasson, sky mage