Each certification number visible on a slab corresponds to a unique, specific item
And for most Elf players thats enough to give Dionus a slot in the 99 of their Elf deck
In short, both of those commanders tend to draw attention away from Dogs, and that makes for a poor Dog-themed commander
Then you can tap it at sorcery speed with a mana to give another dork +1/+1 counters equal to your life gained or lost this turn
On arrival to the battlefield, it will counter any instant, sorcery or ability
This deck has everything you need for a competitive Commander deck, with brute force damage, plenty of card draw potential, some decent ramp and card cost reduction, as well as plenty of diversity amongst the creatures to always keep your opponents on their toes