Artorias and Sif

Double strike.
Whenever Artorias and Sif attacks and is blocked, untap Artorias and Sif, it gets another combat phase. (You can only do this on your turn
and only once on each of your turn)
Whenever Artorias and Sif dies, put a 7/7 Blue Black Red Sif token creature and an Abyssal Sword artifact equipment onto the battlefield under your control.