The second bit of upside for Abeyance is the all-powerful line of text which reads draw a card. This is certainly worth something , but whether or not its worth the extra mana is up for you to decide
Gradually play your innocuous-seeming Drainpipe Vermin and Ravenous Rats, and then refill your hand with Karumonixs ETB effect
After the release of the Four Horsemen, Wizards of the Coast increased the print runs of their product drastically
It makes for a very relaxing card that, honestly, can hit pretty heavily if you have a team of Pokemon on your bench
That permanent gains haste, "When this permanent leaves the battlefield, it deals damage equal to its mana value to each creature," and "At the beginning of your end step, sacrifice this permanent." If a permanent has in its mana cost, X is 0 for the purpose of determining its mana value
Finally, it showed up on the creature Commander (2011 Edition)