Trample
Leviathan enters the battlefield tapped and doesn't untap during your untap step.
At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan.
Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

, Sacrifice Living Armor: Put X +0/+1 counters on target creature, where X is that creature's converted mana cost.

Lurker can't be the target of spells unless it attacked or blocked this turn.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

When you cast this spell, counter it unless you sacrifice a land.
At the beginning of each player's upkeep, that player sacrifices a land.
When there are no lands on the battlefield, sacrifice Mana Vortex.

All creatures get -2/-0 until end of turn.

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

Whenever Marsh Viper deals damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

Exile all white creatures. For each creature exiled this way, its controller draws a card.

: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

: Destroy target creature with islandwalk.

Each player may discard up to three cards. Mind Bomb deals damage to each player equal to 3 minus the number of cards they discarded this way.

: Destroy target Aura attached to a creature you control.

Attacking creatures get +1/+1 until end of turn.

Whenever Murk Dwellers attacks and isn't blocked, it gets +2/+0 until end of combat.

Trample
As Nameless Race enters the battlefield, pay any amount of life. The amount you pay can't be more than the total number of white nontoken permanents your opponents control plus the total number of white cards in their graveyards.
Nameless Race's power and toughness are each equal to the life paid as it entered the battlefield.

Defender (This creature can't attack.)
Exile a creature card from your graveyard: Put X +0/+1 counters on Necropolis, where X is the exiled card's converted mana cost.

, : Regenerate target creature.

, Sacrifice another Orc or Goblin: Other Orc creatures get +1/+1 until end of turn.

People of the Woods's toughness is equal to the number of Forests you control.