Onslaught

All creatures get -2/-2 until end of turn.

Draw a card for each Bird on the battlefield.

For each opponent, gain control of target permanent that player controls.

Each player may search their library for up to X creature cards, reveal those cards, put them into their hand, then shuffle.

Each player's life total becomes the number of creatures they control.

Choose any number of target players or planeswalkers. For each of them, reveal cards from the top of your library until you reveal a nonland card, ...

Untap all creatures and gain control of them until end of turn. They gain haste until end of turn.

Each player chooses a creature type. Each player returns all creature cards of a type chosen this way from their graveyard to the battlefield.

Target opponent puts the cards from their hand on top of their library. Search that player's library for that many cards. The player puts those car...

Target player discards two cards. That player may copy this spell and may choose a new target for that copy.

Target player reveals three cards from their hand and you choose one of them. That player discards that card.

Target opponent draws two cards, then you draw up to four cards. That opponent may repeat this process as many times as they choose.

Return two target creatures to their owners' hands. Cycling {2}{U} ({2}{U}, Discard this card: Draw a card.)

For each opponent, gain control of target permanent that player controls.

Draw a card for each Bird on the battlefield.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

Each player may search their library for up to X creature cards, reveal those cards, put them into their hand, then shuffle.

Each player may reveal any number of creature cards from their hand. Then each player creates a 2/2 green Bear creature token for each card they re...

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Destroy target noncreature permanent. Then that permanent's controller may copy this spell and may choose a new target for that copy.

Each player's life total becomes the number of creatures they control.

Reveal the top five cards of your library. An opponent chooses a creature card from among them. Put that card onto the battlefield and the rest int...

X target creatures can't block this turn.

Thunder of Hooves deals X damage to each creature without flying and each player, where X is the number of Beasts on the battlefield.