Sandstorm Eidolon is a common Creature — Spirit card from Dissension (DIS), collector number 70. Current market price: $0.21 (foil $0.67), TCGplayer market prices via Scryfall.
{R}, Sacrifice this creature: Target creature can't block this turn. Whenever you cast a multicolored spell, you may return this card from your graveyard to your hand.