It's a less powerful version of the Barkskin Cloak, a starting-level item card that you could randomly find in the first chest in the game
The choice of what the best cards in a format are is obviously always somewhat subjective, and it will come down to what a given player likes to play
The problem is, theres only so much this card can actually add to your win percentage
That said, I excluded effects that give flashback or allow you to cast spells without paying their mana cost, like Mizzix's Mastery and similar abilities
2 Defiance Band Extra Damage Can Change An Entire Game Many big-hitting ex-Pokemon, despite being massively strong, cannot one-hit their competition, and with HP pools growing with each expansion, a little boost in damage is much appreciated