From the Vault: Legends

Casting Cost: 

: Search your library for a legendary card, reveal that card, and put it into your hand. Then shuffle your library.

Casting Cost: 

Each creature assigns combat damage equal to its toughness rather than its power.

Casting Cost: 

Haste

: Put a token that's a copy of target nonlegendary creature you control onto the battlefield. That token has haste. Sacrifice it at the beginning of the next end step.

Casting Cost:

Whenever another creature dies, you may put X +1/+1 counters on Kresh the Bloodbraided, where X is that creature's power.

Casting Cost: 

Mikaeus, the Lunarch enters the battlefield with X +1/+1 counters on it.

: Put a +1/+1 counter on Mikaeus.

, Remove a +1/+1 counter from Mikaeus: Put a +1/+1 counter on each other creature you control.

Casting Cost:

Green mana doesn't empty from your mana pool as steps and phases end.

Omnath, Locus of Mana gets +1/+1 for each green mana in your mana pool.

Casting Cost:

Flying

: Choose a color. Target opponent exiles the top X cards of his or her library. For each card of the chosen color exiled this way, put a 1/1 blue and black Faerie Rogue creature token with flying onto the battlefield.

Casting Cost:

Protection from everything

If Progenitus would be put into a graveyard from anywhere, reveal Progenitus and shuffle it into its owner's library instead.

Casting Cost:

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

Whenever a creature you control attacks alone, it gains double strike until end of turn.

Casting Cost:

Flying

When Sharuum the Hegemon comes into play, you may return target artifact card from your graveyard to play.

Casting Cost:

Creatures you control have horsemanship. (They can't be blocked except by creatures with horsemanship.)

Casting Cost:

Flash (You may cast this spell any time you could cast an instant.)

Creature cards you own that aren't on the battlefield have flash.

Each opponent can cast spells only any time he or she could cast a sorcery.

Casting Cost:

When you cast Ulamog, the Infinite Gyre, destroy target permanent.

Indestructible

Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.)

When Ulamog is put into a graveyard from anywhere, its owner shuffles his or her graveyard into his or her library.

Casting Cost: 

Flying

: Destroy target creature. It can't be regenerated.