Easy access to all five colors will make it that much easier to cast The Prismatic Bridge, which will cheat a creature or planeswalker onto the battlefield on your upkeep
It's also one of the most elegant designs in Modern Horizons 3 spoilers so far, and might be one of the best bears ever printed - with due respect to Grizzly Bears, of course
There are quite a number of cards now triggering off first spells, second spells, spells on other players' turn
Since you cannot kill creatures with it and few people play planeswalkers, you might find yourself playing it in a control deck where the two damage is mostly irrelevant, whereas if you play it in an aggro deck, then the two damage becomes an important part of the card, which makes the card even better
Its designed for collectors, so its rarely ever used for casual play.