Scampering Scorcher dies, triggering Nim Deathmantle, causing you to pay ({4} magic symbol) to return Scampering Scorcher from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Scampering Scorcher enters the battlefield, creating two 1/1 Elemental creature tokens and giving Elementals you control haste until end of turn.
Activate Ashnod's Altar by sacrificing an Elemental token, adding ({C} magic symbol) ({C} magic symbol) .