This card covers you really well in both those areas while also being a pretty decent threat that doesn't over extend your board
An effective manabase can't contain only taplands, but there's always room for a few, and the utility on Bojuka Bog makes it well worth being one of them
Watermark: Planeswalker DailyMTG Story Spotlight Illustrated by Clint Cearley Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Im happy to be proven wrong here, and maybe Im missing some key interaction, but Kotis seems great in the 99, not at the helm
Sans Red decks often win through combo or overwhelming card advantage rather than combat damage
The reward of damage, lifegain, and card advantage makes this a surprisingly impactful black creature