Understanding how and when they trigger is important for proper sequencing, making the most of your abilities, and avoiding your opponent's triggered abilities
The artist who designed this card deserves all the praise in the world
This is an absolutely disgusting card to give Storm to, but its also an incredibly cheap removal spell that can help accumulate Storm
They're the card's age, condition, artwork, and availability
At some point, I saw and built a Grixis Dragonstorm Commander deck with cheap ramp spells, tutors, and fast mana to build up into a large Dragonstorm, and swing for the win with hasty dragons thanks to Dragonlord Kolaghan or a convoluted combo involving Worldgorger Dragon and Animate Dead, making it one of the funniest decks Ive ever played with
It mainly appears on black and red creatures, but every color has access to cards with menace