Activate any number of creatures by tapping them, adding at least {2}.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Energy Arc without paying its mana cost.
Resolve Energy Arc, untapping all creatures you control
Activate Ioreth of the Healing House by tapping it, untapping Isochron Scepter.
Repeat.

Infinite magecraft triggers

Infinite mana creatures you control can produce

Infinite storm count

Infinite untap of creatures you control

Isochron Scepter

Ioreth of the Healing House

Energy Arc

Cast Energy Arc by paying {W}{U}.
Kitsa's prowess ability triggers, giving it +1/+1 until end of turn.
Holding priority, activate any number of creatures by tapping them, adding at least {2}.
Activate Kitsa's second ability by paying {2} and tapping it, copying Energy Arc.
Resolve the copy of Energy Arc, untapping all creatures you control.
Repeat from step 3.

Kitsa, Otterball Elite

Activate any number of creatures by tapping it, adding at least {2}.
Activate Elite Arcanist by paying {2} and tapping it, copying Energy Arc and casting the copy without paying its mana cost.
Resolve the copy of Energy Arc, untapping all creatures you control.
Repeat.

Elite Arcanist

Animate Isochron Scepter using Karn, the Great Creator.
Activate any number of creatures by tapping them, adding at least {2}.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Energy Arc without paying its mana cost.
Resolve Energy Arc, untapping all creatures you control
Repeat from step 2.

Karn, the Great Creator

Declare Zethi as an attacker, triggering its second ability.
Holding priority, activate all mana producing creatures you control by tapping them, adding at least {3}{W}{U}.
Activate Lithoform Engine's first ability by paying {2} and tapping it, copying Zethi's triggered ability.
Resolve the copy of Zethi's ability, creating a copy of each card exiled with a kick counter of it and causing you to pay {W}{U} to cast the copy of Energy Arc.
Resolve the Energy Arc copy, untapping all mana producing creatures you control and Aphetto Alchemist.
Activate Aphetto Alchemist by tapping it, untapping Lithoform Engine.
Repeat from step 2.
Once you have infinite mana, you may use that mana to then cast the copies of all other cards exiled with kick counters on them.

Infinite casts of all cards exiled with kick counters on them

Infinite mana nonland permanents you control can produce

Zethi, Arcane Blademaster

Lithoform Engine

Aphetto Alchemist

Activate any number of creatures you control by tapping them, adding at least {5}{G}.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Energy Arc without paying its mana cost.
Resolve Energy Arc, untapping all creatures you control.
Activate Elder Druid by paying {3}{G} and tapping it, untapping Isochron Scepter.
Repeat.

Elder Druid

Cast Storm Herd by paying {8}{W}{W}, creating a number of 1/1 Pegasus creature tokens equal to your life total.
Cast Energy Arc by paying {W}{U}, targeting every creature you control.
Venerated Rotpriest triggers for each creature targeted by Energy Arc.
Resolve the first trigger, causing an opponent to get a poison counter.
Repeat step 4 until an opponent loses the game due to having ten poison counters, then repeat for each other opponent.

Combos with "Energy Arc"