Esper Sentinel

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Bishop of Binding

When this creature enters, exile target creature an opponent controls until this creature leaves the battlefield.
Whenever this creature attacks, target Vampire gets +X/+X until end of turn, where X is the power of the exiled card.

Auriok Bladewarden

{T}: Target creature gets +X/+X until end of turn, where X is this creature's power.

Kudo, King Among Bears

Other creatures have base power and toughness 2/2 and are Bears in addition to their other types.

Abzan Beastmaster

At the beginning of your upkeep, draw a card if you control the creature with the greatest toughness or tied for the greatest toughness.

Topple

Exile target creature with the greatest power among creatures on the battlefield. (If two or more creatures are tied for greatest power, target any one of them.)

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Savage Swipe

Target creature you control gets +2/+2 until end of turn if its power is 2. Then it fights target creature you don't control. (Each deals damage equal to its power to the other.)

Porphyry Nodes

At the beginning of your upkeep, destroy the creature with the least power. It can't be regenerated. If two or more creatures are tied for least power, you choose one of them.
When there are no creatures on the battlefield, sacrifice this enchantment.

Recruiter of the Guard

When this creature enters, you may search your library for a creature card with toughness 2 or less, reveal it, put it into your hand, then shuffle.

Triumph of Ferocity

At the beginning of your upkeep, draw a card if you control the creature with the greatest power or tied for the greatest power.