Activate Phyrexian Altar by sacrificing Disruptive Pitmage, adding {U}.
When Disruptive Pitmage dies, Missy's first ability triggers, returning Disruptive Pitmage from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
Activate Disruptive Pitmage's morph ability by paying {U}, turning it face up.
Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Missy

Phyrexian Altar

Disruptive Pitmage

Activate Phyrexian Altar by sacrificing Disruptive Pitmage, adding {U}.
When Disruptive Pitmage dies, Yedora triggers, returning Disruptive Pitmage from your graveyard to the battlefield face down as a Forest land.
Activate Disruptive Pitmage by tapping it, adding {G}.
Activate Disruptive Pitmage's morph ability by paying {U}, turning it face up.
Repeat.

Infinite green mana

Infinite landfall triggers

Yedora, Grave Gardener

Combos with "Disruptive Pitmage"