Cloudstone Curio | Sadistic Hypnotist | Basking Rootwalla (and two other cards)

Cards

Activate
Sadistic Hypnotist by sacrificing a creature, causing you to discard
Basking Rootwalla and
Blazing Rootwalla into exile.
Basking Rootwalla and
Blazing Rootwalla's madness abilities trigger.
Resolve the
Basking Rootwalla trigger, causing you to pay ({0} magic symbol) to cast it from exile.
When
Basking Rootwalla enters the battlefield,
Cloudstone Curio and
Molten Echoes trigger.
Resolve the
Cloudstone Curio trigger, choosing to return nothing to your hand.
Resolve the
Molten Echoes trigger, creating a token copy of
Basking Rootwalla with haste.
When the creature token enters the battlefield,
Cloudstone Curio triggers, returning
Basking Rootwalla from the battlefield to your hand.
Resolve the
Blazing Rootwalla trigger from step 2, causing you to pay ({0} magic symbol) to cast it from exile.
Repeat steps 4 through 7 one additional time using
Blazing Rootwalla instead.
Repeat from step 1.

This combo has been estimated to be Exhibition (Bracket 1+).