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.

Enchant creature
Enchanted creature gets +1/+0.
: Regenerate enchanted creature.

When Time Elemental attacks or blocks, at end of combat, sacrifice it and it deals 5 damage to you.
, : Return target permanent that isn't enchanted to its owner's hand.

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.

First strike (This creature deals combat damage before creatures without first strike.)

You may tap or untap target artifact, creature, or land.

Prevent all damage that would be dealt to Uncle Istvan by creatures.

Search your library for a basic land card and put that card onto the battlefield. Then shuffle your library.

: 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.)

Flying (This creature can't be blocked except by creatures with flying or reach.)
: Vampire Bats gets +1/+0 until end of turn. Activate this ability no more than twice each turn.

Enchant creature
Whenever enchanted creature blocks or becomes blocked by a non-Wall creature, destroy the other creature at end of combat.

Look at the top five cards of target player's library. You may then have that player shuffle that library.

Defender (This creature can't attack.)
Whenever Wall of Dust blocks a creature, that creature can't attack during its controller's next turn.

Defender (This creature can't attack.)
First strike

Protection from black
At the beginning of each end step, if Whirling Dervish dealt damage to an opponent this turn, put a +1/+1 counter on it.

, : Put a charge counter on White Mana Battery.
, Remove any number of charge counters from White Mana Battery: Add , then add an additional for each charge counter removed this way.

Each player shuffles the cards from their hand into their library, then draws that many cards.

Tap X target creatures. Winter Blast deals 2 damage to each of those creatures with flying.

Tap X target creatures.

: Until your next upkeep, target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost.