mtg.wtf

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

{T}: Add {C}.
{T}: Untap target attacking creature with shadow. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Maze's End enters the battlefield tapped.
{T}: Add {C}.
{3}, {T}, Return Maze's End to its owner's hand: Search your library for a Gate card, put it onto the battlefield, then shuffle. If you control ten or more Gates with different names, you win the game.

{T}, Put a page counter on Mazemind Tome: Scry 1.
{2}, {T}, Put a page counter on Mazemind Tome: Draw a card.
When there are four or more page counters on Mazemind Tome, exile it. If you do, you gain 4 life.

Flying
Whenever a player sacrifices another permanent, put a +1/+1 counter on each creature you control.

Whenever an enchanted creature attacks one of your opponents, it gets +2/+0 and gains trample until end of turn.
Whenever an Aura you control is put into your graveyard from the battlefield, exile it. Until the end of your next turn, you may cast that card.

Meandering River enters the battlefield tapped.
{T}: Add {W} or {U}.

If a red or artifact source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

{5}, Exile Mechtitan Core and four other artifact creatures and/or Vehicles you control: Create Mechtitan, a legendary 10/10 Construct artifact creature token with flying, vigilance, trample, lifelink, and haste that's all colors. When that token leaves the battlefield, return all cards exiled with Mechtitan Core except Mechtitan Core to the battlefield tapped under their owners' control.
Crew 2

As Meddling Mage enters the battlefield, choose a nonland card name.
Spells with the chosen name can't be cast.

Draw four cards. You skip your next turn.

Exile the top ten cards of your library. You may cast spells with exactly three colors from among them this turn. Add {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}. Spend this mana only to cast spells with exactly three colors.

Sliver creatures you control get +3/+3.

Play with the top card of your library revealed.
You may cast instant and sorcery spells from the top of your library.
Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy.

Melt Through deals 2 damage to any target. If it's a creature, it perpetually gains "As long as this creature is on the battlefield, damage isn't removed from it during cleanup steps."

Choose a nonland card name. Search target player's graveyard, hand, and library for any number of cards with that name and exile them. Then that player shuffles.

Aftermath
Each player shuffles their hand and graveyard into their library, then draws seven cards.

Look at the top X cards of your library, where X is the amount of mana spent to cast this spell. Put two of them into your hand and the rest on the bottom of your library in a random order.
Flashback {5}{U}{U}

{T}, Sacrifice Memory Jar: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell.
Whenever you cast a creature spell that doesn't share a creature type with a creature card in your library, draw a card.

Other green creatures you control get +1/+1.

Flying
When Mentor of Evos Isle enters the battlefield, choose a creature card in your hand. It perpetually gains flying.