Hilariously, it is the source of a lot of draws, since both players may have too many non-basic lands to survive the dreaded Price of Progress
When this resolves, it buffs all your other dragons with a +1/+1 bonus, and the fact that storm makes copies of iteach one a tokenmeans you can suddenly have a sky full of fire-breathing threats that act as lords for others of their kind, going from a single pump to a massive Craterhoof Behemoth buff
Rendmaw is more interesting to me,both conceptually and from a gameplay POV
Part of a novel 'Musketeer' archetype Sees some competitive play The most expensive Musketeer promo Every Musketeer promo comes with a fairly steep price tag, and Donald Duck, Musketeer is the most expensive of them all
The mechanic needed an errata that fundamentally changed how you played with them, but even that wasnt enough to save multiple companions from the all-powerful ban hammer