Armguard Familiar

Ward 2 (Whenever this permanent becomes the target of
a spell or ability an opponent controls, counter it unless that player pays 2.)

Equipped creature gets +2/+1 and has ward {2}.

Reconfigure {4} ({4}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)