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.

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.

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.")

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.

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.