Ganax, Astral Hunter | Cloudstone Curio | Slumbering Dragon

(and two other cards)

Cast
Slumbering Dragon by paying ({R} magic symbol) .
When
Slumbering Dragon enters the battlefield,
Ganax and
Cloudstone Curio trigger.
Resolve the
Ganax trigger, creating two Treasure artifact tokens.
Resolve the
Cloudstone Curio trigger, returning
Shivan Devastator from the battlefield to your hand.
Activate the Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({R} magic symbol) .
Cast
Shivan Devastator by paying ({1} magic symbol) ({R} magic symbol) , causing it to enter the battlefield with a +1/+1 counter on it.
When
Shivan Devastator enters the battlefield,
Ganax and
Cloudstone Curio trigger.
Resolve the
Ganax trigger, creating two Treasure artifact tokens.
Resolve the
Cloudstone Curio trigger, returning
Slumbering Dragon from the battlefield to your hand.
Activate a Treasure by tapping and sacrificing it, adding ({R} magic symbol) .
Repeat.
Once you have infinite mana, you may cast
Shivan Devastator for an arbitrarily large amount of mana to put infinite +1/+1 counters on it.