Her second ability not only makes all of your lands indestructible, but also lets you put any number of Forest cards from your library into play
Free-for-All In a similar way to #8 Gerrymandering above, this enchantment is a cool way to set aside all of those nasty creatures, and then slowly, over time, dole them out randomly under peoples control as they take each of their turns
there are other methods to land the Hydra Avatar early
Situation: I bought a 1st Edition Mewtwo, Zapdos, Nidoking, and Ninetales from an individual who has kept these cards (along with many others) in a family photo binder since the early 2000s
Scrapwork Mutt lets you filter through cards twice, be sacrificed twice, trade in combat twice, you get the idea twice
So they start as a 2/2, but they grow more and more powerful every time they deal damage