Destroy target creature. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Teamwork 4 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 4 or more.)
Choose target creature card in your graveyard with mana value 4 or less. If this spell was cast using teamwork, instead choose target creature card in your graveyard. Return the chosen card to the battlefield.

Destroy target attacking or blocking creature.

Trample
When Dori enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Enchant creature
You control enchanted creature.
Enchanted creature gets -3/-0 and loses all abilities.

When you unlock this door, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

At the beginning of combat on your turn, put a +1/+1 counter on each of up to two target creatures.

This creature gets +2/+2 as long as you control a Dinosaur.
: Add one mana of any color.

Threshold — : Put a +1/+1 counter on this creature and draw a card. Activate only if there are seven or more cards in your graveyard and only once.

Target creature gains deathtouch and indestructible until end of turn.

Flying
When this creature enters, create a Clue token. (It's an artifact with ", Sacrifice this token: Draw a card.")
This creature gets +2/+0 as long as you've drawn two or more cards this turn.

Reach (This creature can block creatures with flying.)
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Vigilance
Whenever this creature attacks while saddled, it gets +1/+2 and gains flying until end of turn.
Saddle 3 (Tap any number of other creatures you control with total power 3 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

: Target creature you control that's attacking alone gets +1/+0 until end of turn. You gain 1 life.

Menace (This creature can't be blocked except by two or more creatures.)
Whenever another creature you control with power 2 or less enters, you may discard a card. If you do, draw a card. Do this only once each turn.

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

Until end of turn, target creature you control becomes an Avatar in addition to its other types and gains flying, first strike, lifelink, and hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.)

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Whenever this creature attacks, creatures you control get +1/+1 until end of turn.

When Northern Air Temple enters, each opponent loses X life and you gain X life, where X is the number of Shrines you control.
Whenever another Shrine you control enters, each opponent loses 1 life and you gain 1 life.