However, three mana with zero immediate impact is a huge investment in Modern, and if going wide with Humans and Affinity remains en vogue, keeping Saheeli alive will be challenging
Exile Bahamut, then return it to the battlefield (front side up)
A fetch land is generally better than a shock land, though there are pros and cons to each
For a Magic card, really just a small rectangle of cardboard, the demand is even more subject to change, at least theoretically
But host creatures have another thing in common
This is a very rough guideline, and things are likely to change substantially based on what colors you're drafting, or what strategy you might be going for