Despite a lack of competitive play and the card being eclipsed in power, the promo version has managed to hold pretty consistent value
This dork has trample and haste to swing with evasion now and then combat damage cannot be prevented with Fog Bank dorks, Fog spells or protection from stuff
Other silly cards like Happy Birthday Pikachu from the Ancient Mew set are also banned
The legend rule used to be wild and volatile, but the changes Wizards made were probably for the better
Its drawback may look like its very punishing and can allow the opponent to surprise you via a mid-combat spell, but I never really saw that scenario play out since its damage prevention ability is a a conditional static ability so as long as its on when damage is dealt, it wont be prevented. (Thank you, @fenaris!) It usually plays out somewhat like a colorless Ashenmoor Gouger / Chimeric Idol where you typically dont bother trying to block with it (why am I blocking with my aggro guys anyway?) and, if need be, you cast a spell pre-combat to activate it (typically I used a large coin, like a quarter, to denote whether it was on or off)