mtg.wtf

Destroy all creatures with mana value 3 or less.

Enchant creature
When Ritual of Steel enters the battlefield, draw a card at the beginning of the next turn's upkeep.
Enchanted creature gets +0/+2.

Cumulative upkeep {2}
If a land is tapped for mana, it produces colorless mana instead of any other type.

As an additional cost to cast this spell, sacrifice a creature.
Gain control of target nonartifact, nonblack creature.

Exile target creature card from your graveyard. Create a black Zombie creature token. Its power is equal to that card's power and its toughness is equal to that card's toughness.

At the beginning of each player's upkeep, if that player controls more lands than each other player, Rivalry deals 2 damage to them.

Choose two target creatures that share no creature types. Those creatures fight each other.

Menace
{T}: Add two mana in any combination of colors. Spend this mana only to cast Dragon creature spells.
Once during each of your turns, you may cast a Dragon creature spell from your graveyard.
Whenever you cast a Dragon creature spell from your graveyard, it gains "When this creature dies, exile it."

{T}: Add {B}.

Rivendell enters the battlefield tapped unless you control a legendary creature.
{T}: Add {U}.
{1}{U}, {T}: Scry 2. Activate only if you control a legendary creature.

Islandwalk

Islandwalk
{G}: Regenerate River Boa.

River Darter can't be blocked by Dinosaurs.

River Delta doesn't untap during your untap step if it has a depletion counter on it.
At the beginning of your upkeep, remove a depletion counter from River Delta.
{T}: Add {U} or {B}. Put a depletion counter on River Delta.

Vigilance
When River Herald Guide enters the battlefield, it explores.

When River Herald Scout enters the battlefield, it explores.

Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk.

Flying
{3}{G}{U}: You gain 2 life and draw a card.

Whenever River Kelpie or another permanent enters the battlefield from a graveyard, draw a card.
Whenever a player casts a spell from a graveyard, draw a card.
Persist

{U}: River Merfolk gains mountainwalk until end of turn.

River Serpent can't attack unless there are five or more cards in your graveyard.
Cycling {U}

River Sneak can't be blocked.
Whenever another Merfolk enters the battlefield under your control, River Sneak gets +1/+1 until end of turn.

Meet in Reverse — You draw cards from the bottom of your library rather than the top.
Spoilers — Whenever an opponent scries, surveils, or searches their library, put a +1/+1 counter on River Song. Then River Song deals damage to that player equal to its power.

Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves.
At the beginning of your upkeep, if there are four or more cards exiled with River Song's Diary, choose one of them at random. You may cast it without paying its mana cost.