I'm actively maintaining a comprehensive article to help explain to new cube players how some complex vintage level cards work in a cube environment. Vintage Cube Cards Explained
Decent stat monster that ETBs with a blood token ain't bad, but yeah, it's tough to find a home for this. Falkenarath Aristocrat is way more aggressive, a better sacrifice outlet, and a difficult to deal with closer.
The blood tokens seem pretty bad compared to clues. I think any blood token makers will have to be on cards I'd play anyway, otherwise they won't make it. This card is too meh for a guild slot for me.
I'm not too excited about this card - it lacks haste / sacrifice is not free. This is not Falkenrath Aristocrat.
The upside is you get a blood token at ETB with her + sacrifice is a 4 point life swing.
I don't have high hopes for her.
Vintage Cube Cards Explained
Here are some other articles I've written about fine tuning your cube:
1. Minimum Archetype Support
2. Improving Green Archetypes
3. Improving White Archetypes
4. Matchup Analysis
5. Cube Combos (Work in Progress)
Draft my Cube - https://cubecobra.com/cube/overview/d8i
My High Octane Unpowered Cube on CubeCobra
375 unpowered cube - https://cubecobra.com/cube/list/601ac624832cdf1039947588