It has some added utility at evading discard effects
What if You Kill the Equipment in Response to For Mirrodin
Mana Vault Description : Mana Vault is an artifact that taps for three colourless mana, but it comes into play tapped and requires paying four mana during each upkeep or untap step, or else it deals one damage to its controller
Fastbond First Printed: 1993-AUG Banned: 2009-JUN Fastbond exploits two unique and important aspects of the format: 1) Higher life totals make the damage essentially trivial if this is played in the early game
The problem was this: in order for the system to really work, the majority of the creatures needed multiple types, but my early attempts relied on tricks like making races (aven and nantuko) that naturally had two types or making use of types like Zombie that could be tacked onto another type
Instead, it took until The Command Zone shone a spotlight on the card as an upgrade, one week later, for it to really move