Joust

Sorcery    (CMC:2)

Choose target creature you control and target creature you don't control. The creature you control gets +2/+1 until end of turn if it's a Knight. Then those creatures fight each other. (Each deals damage equal to its power to the other.)

"Life is a tournament that rewards the bold." —Syr Layne, knight of Embereth

129 ELD • ENBram Sels

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Not legal in any format.

Oracle Text (click to copy):

10/4/2019
You can’t cast Joust unless you choose both a creature you control and a creature you don’t control as targets.
10/4/2019
The target creature you control gets +2/+1 only if it’s a Knight as Joust resolves. It’ll still fight if it doesn’t get +2/+1.
10/4/2019
If either target is an illegal target as Joust tries to resolve, neither creature will deal or be dealt damage.
10/4/2019
If the creature you control is an illegal target as Joust tries to resolve, no creature gets +2/+1. If that creature is a legal target but the creature you don’t control isn’t, it still gets +2/+1 until end of turn if it’s a Knight.