Goblin Warrens [Classic Sixth Edition] Spirit but its speaker is

but its speaker is

Set: Dragon's Maze Type: Creature — Elemental Rarity: Mythic Cost: {G}{W} Whenever an opponent casts a spell during your turn or when Voice of Resurgence dies

Set: Commander Anthology Type: Creature — Human Shaman Rarity: Uncommon Cost: {1}{G}{G} When Eternal Witness enters the battlefield

you may return Dimensional Infiltrator to its owner's hand

Goblin Warrens [Classic Sixth Edition] Spirit but its speaker isSet: Classic Sixth Edition Type: Enchantment Rarity: Rare Cost: {2}{R} {2}{R}, Sacrifice two Goblins: Create three 1 1 red Goblin creature tokens. "Goblins bred underground, their numbers hidden from the enemy until it was too late." *Sarpadian Empires*, vol. IV