At best, Jenara is a good beater, and you can orient your deck to have bonuses like exalted, double strike, and unblockable to get the best out of it
Mystic Remora taxes non-creature spells and draws you a ton of cards in the early game when players are casting cheap ramp and tutors
Does this otter know how to conjure lightning bolts
Throw as much mana as you can into it, and it provides a solid body that can threaten immediately with haste, ignore chumps with trample, and defend against retaliation thanks to vigilance
You dont have to start with the commander to build every Commander deck, but its a good way to begin to define what your deck will do
After playing with and against the card, I quickly realized how much of a powerhouse Sheoldred, the Apocalypse can be