Flying

As Primal Clay enters the battlefield, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can’t attack.)

{2}, {T}: Put a charge counter on Red Mana Battery.

{T}, Remove any number of charge counters from Red Mana Battery: Add {R}, then add an additional {R} for each charge counter removed this way.

{3}, {T}: Rod of Ruin deals 1 damage to any target.

As Shapeshifter enters the battlefield, choose a number between 0 and 7.

At the beginning of your upkeep, you may choose a number between 0 and 7.

Shapeshifter’s power is equal to the last chosen number and its toughness is equal to 7 minus that number.

Whenever a creature dies, you may pay {1}. If you do, you gain 1 life.

You may spend white mana as though it were red mana.

{2}, {T}: Target creature with power 2 or less can’t be blocked this turn.

You may choose not to untap Tawnos’s Weaponry during your untap step.

{2}, {T}: Target creature gets +1/+1 for as long as Tawnos’s Weaponry remains tapped.

Flying

Tetravus enters the battlefield with three +1/+1 counters on it.

At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and “This creature can’t be enchanted.”

At the beginning of your upkeep, you may exile any number of tokens created with Tetravus. If you do, put that many +1/+1 counters on Tetravus.

{5}, {T}: Create a 1/1 colorless Insect artifact creature token with flying named Wasp. (It can’t be blocked except by creatures with flying or reach.)

As The Rack enters the battlefield, choose an opponent.

At the beginning of the chosen player’s upkeep, The Rack deals X damage to that player, where X is 3 minus the number of cards in their hand.

Whenever a player casts a black spell, you may pay {1}. If you do, you gain 1 life.

Triskelion enters the battlefield with three +1/+1 counters on it.

Remove a +1/+1 counter from Triskelion: It deals 1 damage to any target.

{0}: Urza’s Avenger gets -1/-1 and gains your choice of banding, flying, first strike, or trample until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s being blocked by or is blocking.)

Defender (This creature can’t attack.)

First strike

{2}, {T}: Put a charge counter on White Mana Battery.

{T}, Remove any number of charge counters from White Mana Battery: Add {W}, then add an additional {W} for each charge counter removed this way.

As long as Winter Orb is untapped, players can’t untap more than one land during their untap steps.

Whenever a player casts a green spell, you may pay {1}. If you do, you gain 1 life.

Vigilance