The non-optional discard makes it hard to play in midrange shells, but low-to-the-ground aggro decks may not have a problem playing nearly hellbent by that point
Wizards of the Coast has been designing more legendary creatures as of late in order to provide players with more options for commanders, meaning that there's a lot more cards to analyze and customize decks with
Hard to use, sure, but I like how swingy it must be
The trick is to somehow cheat
No doubt players will look at this card and their first thoughts will jump to long-time staples such as Relic of Progenitus and Soul-Guide Lantern, both of which can exile entire graveyards while simultaneously giving you the ability to draw a card in the process, replacing what you lose in the transaction
Meneldor, Swift Savior Meneldor, Swift Savior is a good commander for a deck that relies heavily on ETB triggers