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

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Missy

Phyrexian Altar

Riptide Pilferer

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

Infinite green mana

Infinite landfall triggers

Yedora, Grave Gardener

Combos with "Riptide Pilferer"