Whenever an opponent sacrifices an artifact, this creature deals 2 damage to them.

Mounts and Vehicles you control get +1/+1.
This creature saddles Mounts and crews Vehicles as though its power were 2 greater.

This creature enters with X +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on this creature.

At the beginning of your end step, if you control two or more tapped creatures, you may discard your hand. If you do, draw two cards.

When this creature enters, it deals 1 damage to each opponent. Create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.")

Flash
Flying
When this creature enters, you may tap or untap target permanent.

Double strike
: Creatures you control get +1/+1 until end of turn.

Flying, deathtouch
Whenever you gain or lose life during your turn, Bats you control get +1/+0 and gain deathtouch until end of turn. This ability triggers only once each turn.

Whenever a creature you control with a +1/+1 counter on it dies, draw a card.

Haste
This creature attacks each combat if able.
, Sacrifice this creature: Draw a card.

Each opponent loses X life. You gain life equal to the life lost this way.

Changeling (This card is every creature type.)
During your turn, this creature has first strike.

Trample
When this creature enters, choose target creature. If that creature's power is 2 or less or if you control another Lizard, gain control of that creature until end of turn, untap it, and it gains haste until end of turn.

When this enchantment enters, create a 1/1 white Human Soldier creature token.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

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.)