Starting with you, each player separates all permanents they control into three piles. Then each player chooses one of their piles at random and sacrifices those permanents. (Piles can be empty.)

At the beginning of each player's upkeep, that player reveals a card at random from their hand. If it's a land card, the player puts it onto the battlefield. Otherwise, the player casts it without paying its mana cost if able.

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

When this creature enters, you may have it fight target creature you don't control.

Trample
When this creature enters, return another creature you control to its owner's hand.

Reach
As long as Andrios is attacking, tapped creatures you control with base power and toughness 4/3 have base power and toughness 16/9.
: Add . Creature spells you spend this mana to cast have their base power and toughness become 4/3.

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.

Trample
Cumulative upkeep or
When this creature dies, you gain 2 life for each age counter on it.

Trample
When this creature enters, you may search your library for an Aurochs card, reveal it, put it into your hand, then shuffle.
Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

Delve
Target creature gets +6/+6 until end of turn.

Lands you control have ": Create a Treasure token."

Trample
Domain — Whenever this creature deals combat damage to a player, put X +1/+1 counters on target creature you control, where X is the number of basic land types among lands you control.

Trample
When this creature enters, for each kind of counter on permanents you control, you may put your choice of a +1/+1 counter or a counter of that kind on this creature.

When this creature enters, choose one —
• Search your library for a creature card, reveal it, then shuffle and put that card on top.
• Put target noncreature permanent on the bottom of its owner's library.

When Bumi enters, choose up to X, where X is the number of Lesson cards in your graveyard —
• Put three +1/+1 counters on Bumi.
• Target player scries 3.
• Earthbend 3.

Affinity for Elves
When this creature enters, mill four cards, then put all Elf cards from among them into your hand.

Enchant creature
For each other card named Cardboard Carapace you have with you outside the game, enchanted creature gets +1/+1.

: This creature gets +1/+0 until end of turn.

Trample
, Discard a card: Regenerate this creature.

When this creature enters, you gain 3 life.

Backup 1, backup 1, backup 1
Trample
Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it.

Create a tapped 4/4 green Rhino Warrior creature token for each tapped creature you control.

Vanishing 3
When this creature enters or leaves the battlefield, return another target creature card from your graveyard to your hand.

Whenever a creature you control dies, put X +1/+1 counters on target creature you control, where X is the power of the creature that died.

For each creature you control, you may search your library for a creature card with the same name as that creature. Put those cards onto the battlefield, then shuffle.

Reach
When this creature enters, it endures 3.

Lands you control have ": Refill your mug with a festive drink." (If you don't have a mug, go grab a mug! It's the holidays!)
At the beginning of combat on your turn, if you have a drink 'stache, put two +1/+1 counters on each creature you control.

Vivid — Create a number of 5/5 red and green Elemental creature tokens equal to the number of colors among permanents you control. Then you gain life equal to the number of creatures you control.