When Niko Aris enters, create X Shard tokens. (They're enchantments with ", Sacrifice this token: Scry 1, then draw a card.")
+1: Up to one target creature you control can't be blocked this turn. Whenever that creature deals damage this turn, return it to its owner's hand.
−1: Niko Aris deals 2 damage to target tapped creature for each card you've drawn this turn.
−1: Create a Shard token.

Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

Attacking creatures get +X/+0 until end of turn, where X is the number of players being attacked.
Draw a card.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
For each player, you choose a creature that player controls. Then each player sacrifices all other creatures they control that don't share a creature type with the chosen creature they control.

Target creature gains double strike until end of turn.
Cycling (, Discard this card: Draw a card.)

Equipped creature gets +2/+0.
Whenever equipped creature dies, each opponent loses 1 life.
, Sacrifice this Equipment: Draw a card.
Equip

The owner of target spell, nonland permanent, or card in a graveyard puts it on their choice of the top or bottom of their library.

Choose a card type. Target opponent reveals their hand. Create two 1/1 green Saproling creature tokens for each card of the chosen type revealed this way. (Artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery are card types.)

Exhaust — : Put two +1/+1 counters on this creature, then earthbend 2. (Target land you control becomes a 0/0 creature with haste that's still a land. Put two +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped. Activate each exhaust ability only once.)

(: Add .)

This creature enters with X +1/+1 counters on it, where X is the number of other creatures on the battlefield.

When this creature enters, choose one —
• Put a +1/+1 counter on target creature.
• Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Destroy target artifact, enchantment, or creature with power 4 or greater.

Whenever this creature enters or attacks, exile target card from a graveyard. Put a +1/+1 counter on this creature.
This creature has flying as long as a card exiled with it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

When this creature enters, you may discard a card. If you do, draw a card.

Target creature gets +1/+2 until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Whenever Frodo Baggins or another legendary creature you control enters, the Ring tempts you.
As long as Frodo Baggins is your Ring-bearer, it must be blocked if able.

At the beginning of your upkeep, roll a six-sided die. If you a roll a 1, sacrifice this creature and it deals 3 damage to each creature and each player.

Flying
This creature can't block.
Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)