Urza's Saga

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Whenever an opponent plays a land, if Hidden Stag is an enchantment, Hidden Stag becomes a 3/2 Elk Beast creature. Whenever you play a land, if Hid...

When an opponent casts an artifact spell, if Hidden Guerrillas is an enchantment, Hidden Guerrillas becomes a 5/3 Soldier creature with trample.

Search your library for up to two Forest cards, reveal those cards, and put them into your hand. Then shuffle your library.

Trample Echo {1}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unle...

Creatures you control have "Whenever this creature becomes blocked by a creature, this creature gets +1/+1 until end of turn."

At the beginning of each player's upkeep, if that player controls more lands than each other player, the player creates a 1/1 green Saproling creat...

Flying Shroud (This creature can't be the target of spells or abilities.)

When an opponent casts an enchantment spell, if Hidden Ancients is an enchantment, Hidden Ancients becomes a 5/5 Treefolk creature.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

{T}: Add {G} for each Elf on the battlefield.

Whenever a Forest is tapped for mana, its controller adds an additional {G}.

If you would draw a card, you may instead choose land or nonland and reveal cards from the top of your library until you reveal a card of the chose...

Creatures you control have "{T}: Add {G}."

Shroud (This creature can't be the target of spells or abilities.) Echo {3}{G} (At the beginning of your upkeep, if this came under your control si...

Trample When Argothian Wurm enters the battlefield, any player may sacrifice a land. If a player does, put Argothian Wurm on top of its owner's lib...

Enchant Swamp When enchanted land becomes tapped, destroy it. When Spreading Algae is put into a graveyard from the battlefield, return Spreading A...

Shroud (This creature can't be the target of spells or abilities.) Whenever you cast an enchantment spell, draw a card.

Trample At the beginning of your upkeep, sacrifice Endless Wurm unless you sacrifice an enchantment.

At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X i...

Trample At the beginning of your upkeep, sacrifice Child of Gaea unless you pay {G}{G}. {1}{G}: Regenerate Child of Gaea.

Sacrifice a creature: Draw cards equal to the sacrificed creature's power, then discard three cards.

You may play an additional land on each of your turns.