You can find old work of his at Eurogamer, Gfinity, USgamer, SFX Magazine, RPS, Dicebreaker, VG247, and more.
These cards used to be handed out to card shops that organized events, as well as to staff at bigger events and championships
With a little attention to unblockable, or maybe Reconnaissance to get the attack trigger, it could be strong
I've used him to fuel Stroke of Genius or similar effects
First, they boosted the power and toughness bonus it granted, then dropped the cost to only one mana to cast and equip, and finally made it so it gave the creature 1 toughness, and it ended up being that fateful 1 that made Skullclamp into a monster, since all you had to do was play one-toughness creatures and you suddenly had a repeatable, colorless, one-mana Divination
Weve seen some more tricks recently that compete with it, but Battle Rage is still in contention among combat tricks