Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Create a 1/1 green Squirrel creature token.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Sliver creatures you control have flying.

All Slivers have ": Target player mills a card."

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

This creature gets +2/+2 as long as there are three or more land cards in your graveyard.
, , Sacrifice a land: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

Draw two cards, then discard two cards.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Mill two cards.
Draw a card.

Target creature gets -1/-1 until end of turn for each Swamp you control.

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 3-7
4/4
Protection from instants
LEVEL 8+
6/6
Protection from everything

Galvanic Blast deals 2 damage to any target.
Metalcraft — Galvanic Blast deals 4 damage instead if you control three or more artifacts.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
: Add , , or .

Destroy X target artifacts.

Prowess
If a source you control would deal noncombat damage to a creature an opponent controls, put that many -1/-1 counters on that creature instead.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
As long as you have 30 or more life, this creature gets +5/+5 and has flying.

Reach
, Tap an untapped creature you control: Add one mana of any color.

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)

Creature cards in graveyards and libraries can't enter the battlefield.
Players can't cast spells from graveyards or libraries.

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

: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles.

Target player mills two cards.
Draw a card.

, , Sacrifice this artifact: Search your library for a land card, reveal it, put it into your hand, then shuffle.

: Untap target Forest.

Destroy each artifact with mana value X or less.

Equipped creature gets +1/+1 and has trample and lifelink.
: Permanents your opponents control lose hexproof and indestructible until end of turn.
Equip

Sacrifice a creature: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target creature gets -1/-1 until end of turn.
Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.
At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.

Whenever another Zombie you control enters, put a +1/+1 counter on this creature.

This creature doesn't untap during your untap step.
Whenever you cast a green spell, you may untap this creature.

As this artifact enters, choose a card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)

Landfall — Whenever a land you control enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)

: Target player mills a card. (They put the top card of their library into their graveyard.)
, , Sacrifice this artifact: Return target card from your graveyard to your hand.