This spell can't be countered.
Destroy target nonland permanent with converted mana cost 3 or less.

Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

Create a 5/5 green Wurm creature token with trample.

Reveal the top four cards of your library. You may put a creature card from among them onto the battlefield. It gains "At the beginning of your end step, return this creature to its owner's hand." Then put the rest of the cards revealed this way on the bottom of your library in any order.

Put target attacking or blocking creature on top of its owner's library.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

At the beginning of your upkeep, each opponent loses 1 life. You gain life equal to the life lost this way.

Target creature gets -3/-0 until end of turn.
Target creature gets -0/-3 until end of turn.

Destroy target artifact.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Reach
Tap an untapped Spider you control: Search your graveyard and/or library for a card named Arachnus Web and put it onto the battlefield attached to target creature. If you search your library this way, shuffle it.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy Arachnus Web.

Arcane Sanctum enters the battlefield tapped.
: Add , , or .

, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle your library.

First strike
When Attended Knight enters the battlefield, create a 1/1 white Soldier creature token.

Target creature gets +4/-4 until end of turn.

When Augur of Bolas enters the battlefield, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

: Add .

Azorius Guildgate enters the battlefield tapped.
: Add or .

, : Add .

: Draw a card.

If an opponent had an artifact enter the battlefield under their control this turn, you may pay rather than pay this spell's mana cost.
Create a 4/4 green Beast creature token.