Consider whether you want to go with just the mono-color legends or if you want to find a way to bring the two-color commanders in on the fun
Saheeli, the Gifted is a fine commander, with her ability to add a bunch of mana with her second +1 being especially scary, but she suffers from the fact that there are a bunch of artifact-based Commanders available, including the extremely powerful Breya, Etherium Shaper, so being "fine" might not be enough to pick Saheeli, the Gifted as your Commander over other options
Confirm the print first, then the grade
Also of note the creature itself is an illusion which could have other typal implications now and later
This means indirect damage (cards that say player loses x life) count towards this objective
Usually goad wears off at the end of turn, though some goad effects are permanent and take effect each turn indefinitely