Just try translating it into approximate terms. For the bloodgift example, it drains the life and harms the PC, but grants them additional power with which to cast their spells.

A Planeswalker has to have some manner of familiarity with a creature in order to summon it. They're basically summoning their perception of that creature; the more accurate the perception, the more accurate the summon.

No, they're not. It's a replication of the real thing, composed of aether.

Looks good to me, accepted. Only (very minor) gripe is that Auramancer isn't an in-game class, but that is 100% negligible.

So it's more like summoning a familiar? What about the stipulation that two legendary creatures, with the same name, can't be on the field at the same time? Does that still apply? Or may I summon four Niv-Mizzets? Though, I guess it could take too much energy anyway - what if someone else summons the same legendary? - That's a better example.

A familiar is basically a spirit-like copy of something rather than the real thing. I see now that it is the copy half of it, which is what I was asking.

A familiar is basically a spirit-like copy of something rather than the real thing. I see now that it is the copy half of it, which is what I was asking.

That's not what a familiar is by any definition I know. A familiar is usually a demon, spirit, or magically sentient animal which becomes the personal servant/companion of a magic user.

If that is correct then I submit. I have been using the wrong definition.