Active skill
The active skill is an ability of a creature or weapon when it is flying. When a creature has active skill it is indicated by a small text under the card along with its cost, if any. Active skill of a creature can be lobotomized by Mind Flayer and Lobotomizer or can be replaced by other skills that remove the original one, unless the creature cannot be targeted.
Contents
Accretion
Accretion is the active skill of Shard of Focus. Accretion is actually a free destroy ability that provides +0/+15 for the shard until its HP exceeds 45, when it turns into a Black Hole.
Air
Air skill is the ability to generating 
in each turn. Dragonfly | Damselfly has air skill.
Bow
Bow is an ability exclusively for weapon Short Bow | Long Bow, which increases the attack power by 1 if the owner has an mark.
Burrow
Burrow is an ability that renders the creature invulnerable, but halves its attack power. Antlion, Shrieker and Devourer has burrow active skill; however, burrow exists also as passive skill, such in case of Graboid or as a result of Mutation.
Dagger
Dagger is an ability exclusively for weapon Dagger | Dirk, which increases the attack power by 1 if the owner has a 
or 
mark.
Destroy
Destroy ability makes possible to shatter a permanent for 2 or 3 
quanta. Pulverizer has destroy skill.
Earth
Earth skill is the ability to generating 
in each turn. Gnome Rider | Gnome Gemfinder has earth skill.
Evolve
Evolve is an exclusive skill of Graboid: it can turn into a Shrieker for one 
.
Fire
Fire skill is the ability to generating 
in each turn. Ash Eater | Brimstone Eater has fire skill.
Guard
Guard skill allows the creature to delay target creature for 1 turn (guarding creature is delayed as well). It attacks the target creature unless it is airborne.
Hammer
Hammer is an ability exclusively for weapon Hammer | Gavel, which increases the attack power by 1 if the owner has a or mark.
Infest
When a creature has an infest skill, it makes a copy of itself at the end of every turn. As opposed to deja vu skill, the creature does not lose infest skill once it used. Malignant Cell has infest ability by default, while Singularity may gain this skill as one of its negative effects.
Petrify
The target creature gains +0/+20 but can not attack or use skills for 6 turns. Auburn Nymph | Earth Nymph has petrify skill.
