Powerleech [Antiquities] Basic Land you may pay 4 life

you may pay 4 life rather than pay this spell's mana cost

you may have Valakut

This noise is so loud it echoes through the trees and seems to come from all directions at once

Set: Urza's Saga Type: Creature — Shapeshifter Rarity: Rare Cost: {3}{U}{U} {U}: Untap Morphling

and naval troops

Powerleech [Antiquities] Basic Land you may pay 4 lifeSet: Antiquities Type: Enchantment Rarity: Uncommon Cost: {G}{G} Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without {T} in its activation cost, you gain 1 life. The Forest of Argoth has developed a resistance to mechanical intrusion.