Zinnia, Valley's Voice | Cloudstone Curio | Ashnod's Altar

(and one other card)

Cast
Kobolds of Kher Keep by paying ({0} magic symbol) , plus an additional ({2} magic symbol) for its offspring cost.
When
Kobolds of Kher Keep enters the battlefield, it and
Cloudstone Curio trigger.
Resolve the
Cloudstone Curio trigger, returning nothing from the battlefield to your hand.
Resolve the
Kobolds of Kher Keep trigger, creating a token copy of it that is 1/1.
When the
Kobolds of Kher Keep token enters the battlefield,
Cloudstone Curio triggers, returning the nontoken
Kobolds of Kher Keep from the battlefield to your hand.
Activate
Ashnod's Altar by sacrificing the token
Kobolds of Kher Keep, adding ({C} magic symbol) ({C} magic symbol) .
Repeat.