Casey Jones, Vigilante

At the beginning of each combat, Casey Jones gains first strike until end of turn if a creature
an opponent controls has first strike. The same
is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink,
menace, reach, skulk, trample, and vigilance.

You guys mind telling me what you're doing to
my little green pal over there.