mtg.wtf

Spells you cast that would counter a spell cost {U}{U} less to cast.
Whenever a spell an opponent controls is countered by a spell or ability you control, draw a card. The Countering Runner deals 2 psychic damage to that player. (Psychic damage doesn't cause loss of life, but a player who's been dealt 20 psychic damage loses the game.)
Ready to run (You can have two commanders if both have ready to run.)

The Watcher in the Water enters tapped with nine stun counters on it.
Whenever you draw a card during an opponent's turn, create a 1/1 blue Tentacle creature token.
Whenever a Tentacle you control dies, untap up to one target Kraken and put a stun counter on up to one target nonland permanent.

Flash
Flying
Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.

Defender
{4}: Tidewater Minion loses defender until end of turn.
{T}: Untap target permanent.

Draw four cards.

Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Time Reversal.

Target player takes an extra turn after this one.

When Tolarian Contempt enters, put a rejection counter on each creature your opponents control.
At the beginning of your end step, for each opponent, choose up to one target creature they control with a rejection counter on it. That creature's owner puts it on their choice of the top or bottom of their library.

Counter target spell.
Basic landcycling {1}{U}

Target player mills half their library, rounded down.

Enchant creature
When Treachery enters, untap up to five lands.
You control enchanted creature.

Scry X, where X is the highest mana value among permanents you control, then draw three cards.

You may have Vesuvan Doppelganger enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."

As Vesuvan Shapeshifter enters or is turned face up, you may choose another creature on the battlefield. If you do, until Vesuvan Shapeshifter is turned face down, it becomes a copy of that creature, except it has "At the beginning of your upkeep, you may turn this creature face down."
Morph {1}{U}

Draw three cards. Proliferate.

Flash
When this creature enters, counter target artifact or creature spell.

[+1]: Up to two other target planeswalkers you control phase out at the beginning of the next end step.
[–2]: For each opponent, return up to one target nonland permanent that player controls to its owner's hand.
[–7]: Target artifact you control becomes a 9/9 Construct artifact creature and gains vigilance, indestructible, and "This creature can't be blocked."

Flying
When Watcher in the Mist enters, surveil 2.

Kicker {U}
Flying
When Waterspout Elemental enters, if it was kicked, return all other creatures to their owners' hands and you skip your next turn.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Waterspout Weavers, you may reveal it. If you do, each creature you control gains flying until end of turn.

Draw three cards. Target player mills three cards.

Whenever an opponent casts a creature spell, create a token that's a copy of it, except it's 1/1.

Flying
Morph {2}{W}

If an opponent had two or more creatures enter the battlefield under their control this turn, you may pay {U} rather than pay this spell's mana cost.
Return two target creatures to their owners' hands.