Siren's Call [Beta Edition] Nissa Enchanted land is a Swamp

Enchanted land is a Swamp

{T}: Counter target activated ability from an artifact source unless that ability's controller pays {W}

The earth's real treasure is far deeper

Vastwood Seer enters the battlefield

That land is a Swamp for as long as it has a mire counter on it

Siren's Call [Beta Edition] Nissa Enchanted land is a SwampSet: Beta Edition Type: Instant Rarity: Uncommon Cost: {U} Cast this spell only during an opponent's turn, before attackers are declared. Creatures the active player controls attack this turn if able. At the beginning of the next end step, destroy all non Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn.