"What weapon will you bear against one who's mastered them all?"

Balan, Wandering Knight

First strike
Balan, Wandering Knight has double strike as long as two or more Equipment are attached to it.
{1}{W}: Attach all Equipment you control to Balan.

Commander Masters

"I'm feeling generous. I'll let you choose the blade that slays you."

Jumpstart 2022

Commander 2017

Treasure Chest

Balan’s activated ability has no timing restriction. You can activate it any time you have priority.

If Balan deals first-strike damage and then gains double strike (most likely because it picked up some Equipment with its activated ability after first-strike damage was dealt), it will also deal regular combat damage.