Cast Seething Anger with buyback by paying {3}{R}, giving any creature with a power of at least one that entered the battlefield under your control this turn +3/+0 until end of turn, and returning Seething Anger to your hand.
Activate Alena by tapping it, adding at least {R}{R}{R}{R}.
Activate Hermatite Taisman by paying {3}, untapping Alena.
Activate Alena by tapping it, adding at least {R}{R}{R}{R}.
Cast Seething Anger with buyback by paying {3}{R}, giving any creature with a power of at least four that entered the battlefield under your control this turn +3/+0 until end of turn, and returning Seething Anger to your hand.
Activate Hermatite Taisman by paying {3}, untapping Alena.
Activate Alena by tapping it, adding at least seven {R}.
Repeat from step 5.

Infinitely powerful creatures you control until end of turn

Infinite magecraft triggers

Infinite red mana

Infinite storm count

Alena, Kessig Trapper

Hematite Talisman

Seething Anger

Activate Chromatic Orrery by tapping it, adding {C}{C}{C}{C}{C}.
Cast Crown of Flames enchanting a creature.
Pay for Talisman to untap Chromatic Orrery.
Return Crown of Flames to hand using its ability.

Crown of Flames

Chromatic Orrery

Activate Chromatic Orrery by tapping it, adding {C}{C}{C}{C}{C}.
Cast Horned Kavu.
Pay for Talisman to untap Chromatic Orrery.
Return Horned Kavu to hand using its ability.

Infinite ETB

Infinite LTB

Horned Kavu

Activate Nyx Lotus by tapping it, adding at least nine {R}.
Cast Searing Touch with buyback by paying {4}{R}, dealing 1 damage to any target and returning Searing Touch to your hand.
Activate Hematite Talisman by paying {3}, untapping Nyx Lotus.
Repeat.

Infinite damage

Infinite mana among colors with which you have devotion

Nyx Lotus

Searing Touch

Activate Kiki-Jiki by tapping it, copying Blazing Firesinger. It'll enter prepared due to its effect.
Cast a copy of Seething Song by paying {2}{R}.
The Vision and Scarlet Witch triggers as well as Hematite Talisman.
Resolve the Vision and Scarlet Witch trigger, adding {R} and putting a +1/+1 counter on it.
Resolve the Hematite Talisman trigger, causing you to pay {3} to untap Kiki-Jiki.
Resolve Seething Song, adding {R}{R}{R}{R}{R}.
Repeat.

Infinite creature tokens with haste

Infinite death triggers

Infinite sacrifice triggers

Infinite +1/+1 counters on a creature

Kiki-Jiki, Mirror Breaker

Blazing Firesinger // Seething Song

The Vision and Scarlet Witch

Activate Kiki-Jiki by tapping it, copying Blazing Firesinger. It'll enter prepared due to its effect.
Cast a copy of Seething Song by paying {2}{R}.
Thousand-Year Storm and Hematite Talisman trigger.
Resolve the Thousand-Year Storm trigger, copying Seething Song for each instant and sorcery cast before it this turn.
Resolve all copies of Seething Song, adding {R}{R}{R}{R}{R} for each copy.
Resolve the Hematite Talisman trigger, causing you to pay {3} to untap Kiki-Jiki.
Resolve the original Seething Song, adding {R}{R}{R}{R}{R}.
Repeat.

Thousand-Year Storm

Combos with "Hematite Talisman"