Dub

Enchantment — Aura    (CMC:3)

Enchant creature Enchanted creature gets +2/+2, has first strike, and is a Knight in addition to its other types.

"Rise, knight of New Benalia."

015 DOM • ENBastien L. Deharme

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Pioneer,Modern,Legacy,Vintage,Commander,Pauper

Oracle Text (click to copy):

4/27/2018
Dub can enchant a creature that’s already a Knight. It will get +2/+2 and have first strike, but it won’t benefit from becoming a Knight.