ok, so Quicksilver is living metal stuff in the other category.
it is about 6 or so creatures, that use an 'Absorb/Acquire' mechanic to fuse and copy abilities from each other.
Quicksilver Creatures
Golem/Marauder - has core acquire ability
Raptor/Songbird? has airborne, maybe dive or scavenge
Serpent/viper, poison maybe devour
QS Rhino/Champion QS Rhino, momentum
Guard/Sentinel, simple unit
QS Dragon/Elder QS Dragon, the dragon
Shark/Manta, devour burrow
QS puma, QS Cat ; adrenaline snipe
Quicksilver Spells
QS Bond/Fusion absorbs one to another
QS Division/Spawn, splits in two or makes a copy
Quicksilver Permanent
QS Vial/Decanter