Dragon's Herald is a uncommon Creature — Goblin Shaman card from Shards of Alara (ALA), collector number 98. Current market price: $0.08 (foil $0.28), TCGplayer market prices via Scryfall.
{2}{R}, {T}, Sacrifice a black creature, a red creature, and a green creature: Search your library for a card named Hellkite Overlord, put it onto the battlefield, then shuffle.