I think that will be a ton of fun
-sigh- Commanders emphasis on color identity in deckbuilding has successfully kept Krrik, Son of Yawgmoth from being a huge problem in the format as a whole, but its still a powerhouse that should be removed or countered on sight against decks with a large or exclusive emphasis on black, as 4 mana can easily become as much as 16, more if life gain enters the equation
For example, if two creatures you control with lifelink deal combat damage at the same time, Enduring Tenacity's first ability will trigger twice and you may choose a different opponent for each trigger
Jukai Naturalist Lifelink and cost reduction make Jukai Naturalist an all-star in enchantment builds
The last thing you want as the controlling blue deck is to become the target
Six mana for two creatures back on the battlefield by itself isnt bad at all, especially with no downside