The key here is that Obeka asks if the active player wants to end the turn
Seeing as you need another legendary creature in play to take advantage of The Animus, this card will go best in decks that are stacked with a ton of legendary creatures that have powerful activated abilities or triggers
After that though, you could consider a lands-matter sub-theme, playing multiple lands a turn to stack up the triggers
The Sogeking manga rare sits at $854 ungraded
There's also some weak cards like Interceptor, Shadow's Hound which is really cool and self-reanimate is thematic, but there's only a single Assassin in the deck (not even a commander) and a 4/3 without evasion is simply not worth getting back anyway
Alharu, Solemn Ritualist Alharu, Solemn Ritualist is definitely on the high costed side for what it gives you