Requires

Orthion, Hero of Lavabrink must be on the battlefield. Thornbite Staff must be on the battlefield. Catalyst Elemental must be on the battlefield. Orthion does not have summoning sickness. Thornbite Staff attached to Orthion. Mana needed:

Steps

1. Activate Orthion's second ability by paying and tapping it, creating five token copies of Catalyst Elemental with haste.
2. Activate the five Catalyst Elemental tokens by sacrificing them, adding ten .
3. When the Catalyst Elemental tokens die, Orthion triggers, untapping itself.
4. Repeat.
5. Once you have infinite mana, you may forego sacrificing the Catalyst Elemental tokens and/or target any other creature.

Results