Tazran, Impious Necromancer

Haste, menace, hexproof.
When Tazran, Impious Necromancer attacks, create a legendary 4/5 black Skeletal dragon creature token with flying named Kairn that's tapped and attacking.
{1}{u}: Tazran, Impious Necromancer gains flying until the end of turn, activate this ability only if you control a creature named
"Kairn."