It has a lot of generically good tools for Commander at large, and it just so happens to have the best reprint value, despite not being that generous with its reprints anyway
I am fearful of Hogaak, Arisen Necropolis decks and other powerful graveyard strategies emerging in Modern, so I want to employ a full set of Leyline of the Void to give myself a fair shot in the post=sideboard games
I said, "I'm not going to need math." My math teacher just smiled
That Mega Blaziken you pulled as a 4-diamond in Pocket
Beyond just being useful in Final Fantasy Limited, some of these cards have real competitive applications
Kiln Fiend has been disappointing in every way when Ive tried it in the past, but a small dip in the amount that spells pump it in exchange for flying and haste is a significant upgrade