If your reanimation target isnt essentially paying for itself the moment it touches the battlefield, then it should either be individually hard to kill, feature some extremely potent reward for keeping it around, or both
"So to say this was a dream project is Putting it lightly!" Do you have a favorite of the bunch we just revealed
The process is tedious, and existing high-end scanners are expensive
When it enters, creatures get -X/-X, which can wipe tokens or shrink larger threats into range
First up, he's indestructible, letting you attack with him with impunity
Beyond that go for faster lands Sanctum of Ugin, Ancient Tomb, Eye of Ugin, better ramp Mana Crypt, The One Ring for draw, the Eldrazi Titans (all), Conduit of Ruin, Void Winnower, Portal to Phyrexia, okay I'll stop now