Possible skills if the card went for a skill based on permanent converted approach. all of these skills are meant to be weaker "creature specific" versions of the perrmanent's skill.
Phase shield: immaterial, disappears after turns are done.
Mindgate:
mindgate (acquire target creatures skill)
Fog shield:
Wings:
Dive
Unstable Gas:
Dusk Mantle:
cloak adjacent creatures
Nightfall: adjacent darkness or death creatures gain +1|+1
Cloak: adjacent creatures are cloaked (dissapears after turns are done)
Skull Shield: chance to trigger death effects with each successful attack
Boneyard: becomes a random creature when targeted with reverse time
Bonewall: becomes a random creature when targeted with reverse time
Soul catcher: Scavenger
Titanium shield:
Guard
Dissipation shield:
Fire Shield:
Gravity shield:
gravity pull
Catapult:
Thorn carapace: venom
Empathic bond: regenerate
Solar shield: light
Sanctuary:
heal
Procrastination:
stall target creature for a turn
Golden Hourglass:
Sundial:
Ice Shield: chance to freeze enemy weapon
Flooding: adjacent creature slots are flooded
Shield:
SoG: regenerate
SoV: attacks reduce max health.
some permanents would be more difficult than others. suggestions are welcome.