Put target nonland historic permanent into its owner's library fourth from the top. (Artifacts, legendaries, and Sagas are historic.)

Prowess
When this creature enters, return target enchantment card from your graveyard to your hand.

Flying
When this creature enters, target creature or Vehicle gains lifelink and indestructible until end of turn.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
You and target opponent each draw two cards.
Create a 1/1 white Bird creature token with flying.
Put a +1/+1 counter on each of up to two target creatures.

First strike
Provoke

: Prevent the next 2 damage that would be dealt to any target this turn.

At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control.

Artifacts, creatures, and lands your opponents control enter tapped.

When this creature enters, you may have your life total become the total toughness of creatures you control.
: This creature gets +X/+X until end of turn, where X is your life total.

, : Regenerate target artifact.

, : Tap target creature.

At the beginning of your upkeep, the player with the lowest life total gains control of this creature. If two or more players are tied for lowest life total, you choose one of them, and that player gains control of this creature.

This creature gets +2/+2 for each Equipment attached to it.

Convoke
When this creature enters, you gain 4 life.

Vigilance
When this creature enters, other creatures you control gain vigilance until end of turn.

Vigilance
: This creature gets +0/+1 until end of turn.

Vigilance
When this creature dies, return it to the battlefield transformed under your control at the beginning of the next end step.

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

Defender, flying
Whenever you cast a white spell, this creature loses defender until end of turn.

Flying
This creature can't attack or block alone.

Sacrifice this creature: Return target legendary creature card from your graveyard to the battlefield. Activate only during your turn, before attackers are declared.

When this creature blocks a creature, destroy that creature and this creature.

Search your library for a planeswalker card, reveal it, then shuffle and put that card on top.

Vigilance
Lieutenant — At the beginning of combat on your turn, if you control your commander, prevent all combat damage that would be dealt to creatures you control this turn. Other creatures you control gain vigilance until end of turn.

Vigilance
When this creature enters, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.