When this artifact enters, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.

Whenever Radagast or another nontoken creature you control enters, look at the top X cards of your library, where X is that creature's mana value. You may reveal a creature card that doesn't share a creature type with a creature you control from among those cards and put it into your hand. Put the rest on the bottom of your library in a random order.

If a triggered ability of an Ally you control triggers, that ability triggers an additional time.

, : Target player mills a card. (They put the top card of their library into their graveyard.)
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.

: Add . This land deals 2 damage to you.

Return target creature to its owner's hand. Untap up to two lands.

: Add .
, : Untap target legendary permanent.

, Sacrifice an artifact: Target player mills three cards.
Whenever an artifact enters, you may untap this artifact.

When Celes enters, discard any number of cards, then draw that many cards plus one.
Whenever one or more other creatures you control enter, if one or more of them entered from a graveyard or was cast from a graveyard, put a +1/+1 counter on each creature you control.

Horsemanship (This creature can't be blocked except by creatures with horsemanship.)
When Sun Ce enters, you may return target creature to its owner's hand.

Whenever a creature you control enters, you may destroy target artifact or enchantment.

Enchant creature
You control enchanted creature.

Horsemanship (This creature can't be blocked except by creatures with horsemanship.)
Each creature you control can't be blocked by more than one creature.

Other Mice you control get +1/+1.
When Mabel enters, create Cragflame, a legendary colorless Equipment artifact token with "Equipped creature gets +1/+1 and has vigilance, trample, and haste" and equip .

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling (, Discard this card: Draw a card.)

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional .

Flash
When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Target spell or permanent becomes blue. (Mana symbols on that permanent remain unchanged.)

Flying
At the beginning of your upkeep, this creature deals 1 damage to you.

When this creature enters, earthbend 1. (Target land you control becomes a 0/0 creature with haste that's still a land. Put a +1/+1 counter on it. When it dies or is exiled, return it to the battlefield tapped.)
Whenever you tap a creature for mana, add an additional .