{T}: Add {U} for each counter on Nardole. Spend this mana only to cast noncreature spells. Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Doctor's companion (You can have two commanders if the other is the Doctor.)

This artifact enters with X charge counters on it. {T}: Choose a color. Add one mana of that color for each charge counter on this artifact.

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.) This artifact enters with a charge counter on it for each time it was kicked. {T}: Add {C} for each charge counter on this artifact.

When this creature dies, put a shield counter on target creature you control. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

Partner with Chakram Slinger (When this creature enters, target player may put Chakram Slinger into their hand from their library, then shuffle.) Whenever you cast a spell during your turn, untap target creature.

{T}: Put a charge counter on target artifact. Sacrifice this creature: Put two charge counters on target artifact.

Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

{T}: Move a counter of each kind not on Goldberry from another target permanent you control onto Goldberry. {U}, {T}: Move one or more counters from Goldberry onto another target permanent you control. If you do, draw a card.

This creature enters with a +1/+1 counter on it. When this creature dies, if it had counters on it, put those counters on target creature you control.

{T}: Untap another target permanent.

Sacrifice this creature: Put a +1/+1 counter on target creature.

Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of cards in your library.

Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on each creature that had a +1/+1 counter put on it this way. Overload {4}{G}{G} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

At the beginning of the end step, if you control four or more creatures named Biovisionary, you win the game.

For each of X target permanents, create X tokens that are copies of that permanent.

This artifact enters with X charge counters on it, where X is your life total. Landfall — Whenever a land you control enters, you may have your life total become the number of charge counters on this artifact.

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever you cast an artifact creature spell, it gains sunburst. (It enters with a +1/+1 counter on it for each color of mana spent to cast it.) At the beginning of your end step, if there are thirty or more counters among artifacts and creatures you control, this artifact deals 10 damage to each opponent.

Sunburst (This enters with a charge counter on it for each color of mana spent to cast it.) Remove a charge counter from this artifact: Add one mana of any color.

Flying When this creature enters, return a creature you control to its owner's hand.

Counter target spell.

Put a +1/+1 counter, a reach counter, and a deathtouch counter on target creature. Untap it.

You may exile a blue card from your hand rather than pay this spell's mana cost. Change the target of target spell with a single target.

Draw X cards, then discard a card.

Target creature you control gets +1/+1 and gains hexproof until end of turn. Untap it. (It can't be the target of spells or abilities your opponents control.)

Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)