At the beginning of your upkeep, you may put a charge counter on this artifact.
: You may put a creature card with mana value equal to the number of charge counters on this artifact from your hand onto the battlefield.

As this artifact enters, choose an opponent.
At the beginning of the chosen player's upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4.

Imprint — When this artifact enters, you may exile an instant card with mana value 2 or less from your hand.
, : You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

, , Sacrifice this artifact: Search target player's library for three cards and exile them. Then that player shuffles.

Whenever Karn blocks or becomes blocked, it gets -4/+4 until end of turn.
: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.

At the beginning of your upkeep, sacrifice this creature unless you discard a card.
: This creature deals 1 damage to target creature.
: Regenerate this creature.

, Sacrifice this artifact: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.

Whenever you cast an instant or sorcery spell, you may pay . If you do, copy that spell. You may choose new targets for the copy.

If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard.
: Add one mana of any color.

This artifact enters tapped.
, : Destroy all artifacts, creatures, and enchantments.

: Add .

When this creature enters or leaves the battlefield, choose a land of each basic land type, then destroy those lands.

Equipped creature gets +2/+2 and has protection from green and from blue.
Whenever equipped creature deals combat damage to a player, you create a 2/2 green Wolf creature token and that player mills ten cards.
Equip

Sacrifice a land: You gain 2 life.