Quote from frozencajun »For those unsure about the burn matchup (I switched from burn to play Ponza but I still play it about 25% of the time in Modern and 100% of the time in Legacy) Blood Moon isn’t that great. You can keep in the other Rain effects because Trinisphere is your friend here along with your life gain package.
I do exactly the opposite. I keep Blood Moon in as it shuts off Boros Charm, Lightning Helix, Destructive Revelry and possibly Atarka's Command. I find it pretty hard to lock Burn out under a Trinisphere. Sure it's possible to lock them out of the game but they have way more lands than we have land destruction spells, so they eventually draw out of the lock and we end up drawing land destruction when they have 4 lands in play.
A second more practical reason is that I always have lots of cards that I want to bring in against Burn: Trinispheres, Kitchen Finks, Obstinate Baloths, and I need to side something out, so out goes the land destruction.