When Lost Legion enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Enchant creature
Enchanted creature gets +2/+2 and has ", Sacrifice a permanent: This creature gains flying until end of turn."

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, create a 1/1 white Monk creature token with prowess.

Flying
Whenever Nimbus Champion attacks, you may return target creature to its owner's hand if that creature's power is less than or equal to the number of Warriors your team controls.

: Oran-Rief Invoker gets +5/+5 and gains trample until end of turn.

Menace, deathtouch
Instant and sorcery spells you control have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)

Untap all creatures and lands you control during each other player's untap step.
You may cast creature spells as though they had flash.

When Relief Captain enters the battlefield, support 3. (Put a +1/+1 counter on each of up to three other target creatures.)

Delve (Each card you exile from your graveyard while casting this spell pays for .)
Return target nonland permanent you control and target nonland permanent you don't control to their owners' hands.

Flying
Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn.

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

, , Discard a card: Each player loses 2 life.

Reach

Flying
Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)
When Stratus Dancer is turned face up, counter target instant or sorcery spell.

Creatures your opponents control get -1/-1 until end of turn.
Cycling (, Discard this card: Draw a card.)

Defender (This creature can't attack.)
, : Target creature can't be blocked this turn.

Rally — Whenever Tajuru Warcaller or another Ally enters the battlefield under your control, creatures you control get +2/+2 until end of turn.

This spell costs less to cast for each instant and sorcery card in your graveyard.
You have no maximum hand size.
At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.

Flying
Whenever Thundering Djinn attacks, it deals damage to any target equal to the number of cards you've drawn this turn.

Whenever an artifact enters the battlefield under your control, you may pay . If you do, each opponent loses 1 life and you gain 1 life.
, Sacrifice Underhanded Designs: Destroy target creature. Activate this ability only if you control two or more artifacts.