Spirit Link or Vampiric Link give your creatures a form of lifelink which can stack with itself or the actual keyword
The best part of this card, besides probably getting yourself a bunch of value, is that what it can destroy is anything but lands
This list here is almost at the stage where the blue is a splash, it has no doubles and fewest blue mana requirements however it has a little too much one drop card quality in blue to be a real splash
The play pattern is to store a lot of mana producing a really big Omnath, and if you dont attack, you get to cast a big creature or a powerful X spell
The final ability on the card, which allows its controller to pay three mana and sacrifice another creature to draw cards equal to the sacrificed creatures toughness, then discard cards equal to its power, will pair perfectly with not only walls, but certain treefolk, turtles, and plants, too creature types that will almost certainly fill out an eventual Felothar deck
Honestly, the downside of skipping your draw step on Necropotence is laughably irrelevant
