In a Two-Headed Giant game, the Beast token can attack or block with a creature controlled by your teammate, even if no other creatures you control are attacking or blocking
The -3 highlights Guffs major issue: Its only great when you control a ton of planeswalkers, which usually means youre already in a winning position
Waterlogged Teachings and Stump Stomp will be useful in every deck theyre eligible for, and while Strength of the Harvest appears to only be relevant for specific archetypes, be honest: when was the last time you saw a Selesnya deck that wasnt about spamming the board with either creatures or enchantments
If an ability of an object refers to that object by name, and an object with a different name gains that ability, all instances of the first name in the gained ability should be treated as the second name
Instead of trying to damage the opponents Leader, this deck focuses on milling itself, dropping to 0 cards in the deck and automatically winning the game
Locking a Storm deck out of 1 CMC spells means no Vampiric Tutor, High Tide, Dark Ritual, and so on, while making it immune to being removed by Swords to Plowshares