This Green-White token strategy is built around generating an army of creatures, buffing them up, and marching to victory in true go-wide fashion
There will be a lot of two and three power creatures attacking in the early game of Kaladesh Limited and having four toughness will be very important
You can still lose the game for other reasons, including having ten or more poison counters or drawing a card from a library with no cards in it
Despite the recent love for Merfolk, Pirates, and Dinosaurs, Elves are
In fact, looking over the most played cards in the format, the only thing Solemnity does is keep Chalice of the Void at zero (although since Solemnity doesn't come down until Turn 3 and Chalice of the Void is often played on Turn 1, it doesn't even really do this all that reliably)