Ill-Tempered Loner can be transformed.
You have a way to deal damage to Ill-Tempered Loner.

Cast Angelfire Ignition by paying , giving Ill-Tempered Loner lifelink and indestructible until end of turn.
Deal damage to Ill-Tempered Loner.
Ill-Tempered Loner triggers, dealing 2 damage to itself and causing you to gain two life.
Repeat step 3.

Grimgrin does not have summoning sickness.

Activate Grimgrin by tapping it, adding .
Activate Grimgrin by sacrificing Gravecrawler, untapping Grimgrin and putting a +1/+1 counter on it.
Cast Gravecrawler from your graveyard by paying .
Repeat.

Whenever your life total would be reduced to 0 or less, Mirrorhall Mimic sets your life total to 3 instead and transforms itself, but remains a copy of Enduring Angel.
Whenever your life total would be reduced to 0 or less, Ghostly Mimicry sets your life total to 3 instead and transforms itself, but remains a copy of Enduring Angel.
Repeat.

You can cast both affinity cards for .
One of the affinity cards must be in your hand, with the other on the battlefield.

Cast the card with affinity in your hand by paying .
Hullbreaker Horror triggers, returning the other affinity card from the battlefield to your hand.
Resolve the spell cast in step 1.
Repeat.

Cast one of the permanents from your hand by paying .
Hullbreaker Horror triggers; choose to return nothing.
That permanent enters the battlefield.
Cast one of the permanents from your hand by paying .
Hullbreaker Horror triggers, returning the other permanent from the battlefield to your hand.
The permanent you cast enters the battlefield.
Repeat from step 4.

The Infinite ETB and Infinite LTB results are only for variants with at least one creature.

Chalice of the Void is included in this template search but will not work in this combo.