Not like Gravecrawler exists or anything
As there are numerous legendary creatures that directly reference enchantments, it's no surprise that there are numerous potent enchantment-based commanders for players to choose from when constructing a commander deck
Youll actually cast the suspend card for its mana cost, so youll cast Greater Gargadon for a red mana, or cast Ancestral Vision for a blue mana
This allows you to deploy him much earlier than his base cost suggests, provided youve spent the early turns establishing a board of low-cost artifact creatures
This can make big creatures even tougher, or it enables tricky effects that are based on adding or removing +1/+1 counters for various effects
Heh, the oldest rules don't have steps, and that "dying at the end of a phase" thingie was a rule change that came with Revised (and was removed again with Sixth edition)