If you try to go to four colors, you need more different fetchable lands, which means you get fewer fetchlands, so more of your lands only offer access to one or two colors instead of three or four colors, and you cant make the numbers work
He gives +1 to both Power and Life to every token you have and since this deck will have a majority of your battlefield be tokens, this is a pretty easy way to buff them
Typically, MTG cards live and die based on their mechanical synergy, with prices rising and falling as new Commanders get released
Read More: The 10 Best Equipment Commanders In MTG 4 Vigor Vigor is another Green Creature, although this one is a six mana 6/6 with trample
You can then remove two counters to siphon a counter from another permanent, a pretty poor rate compared to a card like Hex Parasite (which is clearly modeled after our friend Spinal Parasite)