Choose one —
• Target nonsnow permanent becomes snow until end of turn.
• Target snow permanent isn't snow until end of turn.
Draw a card at the beginning of the next turn's upkeep.

: Thermopod gains haste until end of turn. ( can be paid with one mana from a snow permanent.)
Sacrifice a creature: Add .

Spells you cast have ripple 4. (Whenever you cast a spell, you may reveal the top four cards of your library. You may cast spells with the same name as that spell from among the revealed cards without paying their mana costs. Put the rest on the bottom of your library.)

Tresserhorn Sinks enters the battlefield tapped.
: Add or .

Flying
Prevent all damage that would be dealt to Tresserhorn Skyknight by creatures with first strike.

Ursine Fylgja enters the battlefield with four healing counters on it.
Remove a healing counter from Ursine Fylgja: Prevent the next 1 damage that would be dealt to Ursine Fylgja this turn.
: Put a healing counter on Ursine Fylgja.

Exile target creature. You draw cards equal to that creature's power. At the beginning of your next upkeep, return that card to the battlefield under its owner's control. If you do, discard cards equal to that creature's toughness.

Flying
Cumulative upkeep—Discard a card. (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.)
When Vexing Sphinx dies, draw a card for each age counter on it.

Trample
If another creature would die, exile it instead.
Put a card exiled with Void Maw into its owner's graveyard: Void Maw gets +2/+2 until end of turn.

Defender, flying
Cumulative upkeep—An opponent gains 1 life. (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.)

Protection from black
: White Shield Crusader gains flying until end of turn.
: White Shield Crusader gets +1/+0 until end of turn.

Trample
Wilderness Elemental's power is equal to the number of nonbasic lands your opponents control.

Woolly Razorback enters the battlefield with three ice counters on it.
As long as Woolly Razorback has an ice counter on it, prevent all combat damage it would deal and it has defender.
Whenever Woolly Razorback blocks, remove an ice counter from it.

Snow landwalk (This creature can't be blocked as long as defending player controls a snow land.)
: Regenerate Zombie Musher. ( can be paid with one mana from a snow permanent.)

Flying
Whenever Zur the Enchanter attacks, you may search your library for an enchantment card with converted mana cost 3 or less and put it onto the battlefield. If you do, shuffle your library.