(A creature with hexproof can't be the target of spells or abilities your opponents control.) A land that becomes a creature because of Avalanche Caller's activated ability will retain any other supertypes, card types, subtypes, and abilities it had
It wasnt uncommon to play with a meta deck and be paired against somebody playing Basic Yellow, only to be told that its unfair to play a real deck in beta followed by a rage quit
Another advantage of this strict rule on card sizes is that it makes it harder for anyone to create fake cards and sell them for a profit
Sylvan Library (green, 2 mana): Three cards per turn, with a life-payment trade-off
Barnabas can also teleport into the air, bringing the sword vertically down over his head in a slash that slams down and sends a flaming wave down the path of the sword, and a simple dodge to either side will be enough to avoid this attack