During gameplay, a player may choose to attack any other player, regardless of their position on the table, and can also choose to attack multiple different players during their attack phase
You dont need to run the common printing to include this card in your deck
And for those aforementioned Golem decks
You can make, in Mono-Green alone, 1/1 Squirrels, Insects, Saprolings, 2/2 Wolves, Bears, 3/3 Centaurs, Elephants, Beasts, from Squirrel Nest to Grizzly Fate to draw tons of cards
Then when you cast a Merfolk spell you can spend 1 to make a 1/1 Merfolk dork
Since most Hydras don't have generic costs to reduce, this mana is instead automatically pumped into the X section of a Hydra's mana cost, essentially giving it a free power and toughness boost