The downside is that you have to spend valuable early-game mana to get this on the table while its still relevant
Whenever you resolve the final chapter ability of a saga while Bombadil is in play, you get to exile cards from the top of your library until you hit another saga, put it into play, and then tuck the exiled cards in a random order
There are so many potential blowouts you can walk into with Silverblade Paladin thanks to Unsummon, Searing Spear, Azorius Charm, etc
This of course means you can go after all of your opponents best non enchantment nonland permanents all at once
Another card that operates in this axis is Goblin Charbelcher
Or, if you want to cause chaos, this doesnt specify that the instants/sorceries have to be only (or even at all) yours