Preston, the Vanisher | Phantom Train | Nature's Rhythm

(and one other card)

({5} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) at most available.

Cast
Nature's Rhythm from your hand by paying ({5} magic symbol) ({G} magic symbol) ({G} magic symbol) or from your graveyard for its harmonize cost by paying at most ({5} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) , searching your library for
Karmic Guide and putting it onto the battlefield.
When
Karmic Guide enters, it and
Preston trigger.
Resolve the
Karmic Guide trigger, returning an applicable target from your graveyard to the battlefield.
Holding priority, activate
Phantom Train by sacrificing
Karmic Guide.
Resolve the
Preston trigger, creating a token copy of
Karmic Guide that is a 0/1 Illusion.
When the
Karmic Guide token enters, it triggers, returning
Karmic Guide from your graveyard to the battlefield.
Repeat from step 2.