You may have Wall of Stolen Identity enter as a copy of any creature on the battlefield, except it’s a Wall in addition to its other types and has defender. When you do, tap the copied creature and it doesn’t untap during its controller’s untap step for as long as you control Wall of Stolen Identity.
As Flamekin Village enters, you may reveal an Elemental card from your hand. If you don’t, Flamekin Village enters tapped. {T}: Add {R}. {R}, {T}: Target creature gains haste until end of turn.
You may choose not to untap Callous Oppressor during your untap step. As Callous Oppressor comes into play, an opponent chooses a creature type. T: Gain control of target creature that isn't of the chosen type as long as Callous Oppressor remains tapped.
If Clambassadors damages any player, choose an artifact, creature, or land you control. That player gains control of that artifact, creature, or land.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell.
Choose a creature type other than Legend or Wall. Each creature's type becomes that type until end of turn.
Whenever a player taps a Mountain, Forest, or Plains for mana, that player adds one mana to his or her mana pool of any type that land produced.
Whenever Elvish Mariner attacks, scry 1. Whenever you scry, tap up to X target nonland permanents, where X is the number of cards looked at while scrying this way.
Flying Haughty Djinn's power is equal to the number of instant and sorcery cards in your graveyard. Instant and sorcery spells you cast cost 1 less to cast.
Flash When Venser, Shaper Savant enters the battlefield, return target spell or permanent to its owner's hand.
T: Add C. 2, T: Thespian's Stage becomes a copy of target land, except it has this ability.
Flying Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value. (Create an Incubator token with X +1/+1 counters on it and "2: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)