he Ravnica card Concerted Effort is all about sharing -- for the purpose of butt-kicking.
As you can see in Michael Sutfin's art below, the card depicts a Boros soldier and angel. The soldier begins to launch from the ground on the strength of his ghostly new set of wings -- a "copy" of the angel's wings. The angel holds high her sharp new polearm -- a "copy" of the soldier's weapon.
Concerted Effort art by Michael Sutfin
This represents how the enchantment grants your creatures' abilities to each other -- flying and double strike, for example. Sharing is caring! (And nothing says "caring" like free double strike.)