Activate Kragma Butcher by tapping it, adding {U}.
Activate Pemmin's Aura by paying {U}, untapping Kragma Butcher.
Kragma Butcher triggers, giving it +2/+0 until end of turn.
Repeat.

Infinitely powerful creature until end of turn

Kragma Butcher

Pemmin's Aura

Paradise Mantle

Activate Clock of Omens by tapping it and Kragma Butcher, targeting Kragma Butcher.
Ertha Jo triggers, copying Clock of Omens' ability, targeting Clock of Omens.
Resolve both Clock of Omens  abilities, untapping it and Kragma Butcher.
Kragma Butcher triggers, giving it +2/+0 until end of turn.
Repeat.

Combos with "Kragma Butcher"