Baneslayer Aspirant gets +3/+3 and has flying, first strike, and lifelink as long as you have one or more emblems.

You gain X life and each opponent loses X life, where X is the number of Knights you control.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Moonblade Shinobi deals combat damage to a player, create a 1/1 blue Illusion creature token with flying.

Lifelink

Enchant creature
Enchanted creature gets +2/+2, has menace, and can't attack you or a planeswalker you control. (It can't be blocked except by two or more creatures.)