Dark Depths enters with ten ice counters on it.
: Remove an ice counter from Dark Depths.
When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.

Haste
Equipped creature gets +1/+1 and has haste.
Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

(: Add .)

Choose one —
• Boros Charm deals 4 damage to target player or planeswalker.
• Permanents you control gain indestructible until end of turn.
• Target creature gains double strike until end of turn.

As an additional cost to cast this spell, discard a card or pay .
Lightning Axe deals 5 damage to target creature.

Indestructible
As long as your devotion to green is less than five, Nylea isn't a creature.
Creature spells you cast cost less to cast.
: Reveal the top card of your library. If it's a creature card, put it into your hand. Otherwise, you may put it into your graveyard.

Each opponent secretly chooses silence or snitch, then the choices are revealed. If each opponent chose silence, Prisoner's Dilemma deals 4 damage to each of them. If each opponent chose snitch, Prisoner's Dilemma deals 8 damage to each of them. Otherwise, Prisoner's Dilemma deals 12 damage to each opponent who chose silence.
Flashback

When this creature enters, you may search your library for an Elf card, reveal it, then shuffle and put that card on top.
: Add one mana of any color.

Whenever a token you control enters, you gain 1 life if this is the first time this ability has resolved this turn. If it's the second time, draw a card. If it's the third time, put a +1/+1 counter on each creature you control.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

: Add .
, , Pay life equal to the number of colors in your commanders' color identity: Draw a card.

Flying, lifelink, haste
Whenever Otharri attacks, you get an experience counter. Then create a 2/2 red Rebel creature token that's tapped and attacking for each experience counter you have.
, Tap an untapped Rebel you control: Return this card from your graveyard to the battlefield tapped.

Flash
You may cast noncreature spells as though they had flash.
Whenever you cast a noncreature spell, Birds, Frogs, Otters, and Rats you control get +1/+1 until end of turn. Untap them.

When this creature enters, draw a card.

Whenever you gain life, target opponent loses that much life.

Flying
Ward—Sacrifice a creature.
Whenever a creature dies, target opponent loses 2 life and you gain 2 life.

Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.

Flying, vigilance
Battalion — Whenever Captain America and at least two other creatures attack, put a +1/+1 counter on each attacking creature. They gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Whenever you cast a historic spell, draw a card. (Artifacts, legendaries, and Sagas are historic.)

Destroy X target artifacts and/or creatures. For each permanent destroyed this way, its controller reveals cards from the top of their library until an artifact or creature card is revealed and exiles that card. Those players put the exiled cards onto the battlefield, then shuffle.