Luca, Grayguard Captain

Partner with Grayson, the White-Clad King
If you control Grayson when this creature enters
the battlefield, put a shield counter on Grayson.
Whenever Luca deals combat damage to an
opponent, if it is equipped with a legendary equipment, it deals that much damage to each
other opponent.
Counters remain on Luca as it moves zones.
{2}{w}{w}: Put Luca into play from the
command zone. Activate only if you control
Grayson, the White-Clad King.