Elegant Entourage

Alliance — Whenever another creature you control enters, target creature other than this creature gets +1/+1 and gains trample until end of turn.

Copperhorn Scout

Whenever this creature attacks, untap each other creature you control.

Attended Socialite

Alliance — Whenever another creature you control enters, this creature gets +1/+1 until end of turn.

Glittermonger

{T}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Ezuri's Archers

Reach (This creature can block creatures with flying.)
Whenever this creature blocks a creature with flying, this creature gets +3/+0 until end of turn.