Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

: Adarkar Sentinel gets +0/+1 until end of turn.

: Add or . Spend this mana only to pay cumulative upkeep costs.

: Add .
: Add or . Adarkar Wastes deals 1 damage to you.

, : Target 1/1 creature gets +1/+2 until end of turn.

Enchant non-Wall creature
Enchanted creature has first strike and trample.
At the beginning of the end step of enchanted creature's controller, destroy that creature if it didn't attack this turn.

As an additional cost to cast this spell, sacrifice a creature.
Search your library for a creature card, reveal that card, and put it into your hand. Then shuffle your library.

Remove Amulet of Quoz from your deck before playing if you're not playing for ante.
, Sacrifice Amulet of Quoz: Target opponent may ante the top card of their library. If they don't, you flip a coin. If you win the flip, that player loses the game. If you lose the flip, you lose the game. Activate this ability only during your upkeep.

Destroy all white permanents.

Arctic Foxes can't be blocked by creatures with power 2 or greater as long as defending player controls a snow land.

, : Target creature gains vigilance until end of turn. Activate this ability only during combat and only if defending player controls a snow land.

, : Target snow land is no longer snow.
, : Target nonsnow basic land becomes snow.

, : Choose target non-Wall creature the active player has controlled continuously since the beginning of the turn. That player may pay , where X is that creature's converted mana cost. If they don't pay, the creature attacks this turn if able, and at the beginning of the next end step, destroy it if it didn't attack this turn. Activate this ability only before attackers are declared.

, Sacrifice an enchantment: Destroy target enchantment.
: Counter target enchantment spell.

Enchant creature
Enchanted creature gets +1/+1.
: Enchanted creature gets +0/+1 until end of turn.

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
: Target creature gains flying until end of turn.

Haste
: Return Ashen Ghoul from your graveyard to the battlefield. Activate this ability only during your upkeep and only if three or more creature cards are above Ashen Ghoul.

Trample
Whenever Aurochs attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.

Destroy X target snow lands.