The second auto-ability dulls the Terra card at the point when effects are resolved
Spider-Man will of course contain many Spiders, but a lot of the deckbuilding hooks for those characters will key more into the Hero creature type
Ultimately, this card could help players build up quite the dangerous board state
As for the card, it's a copy of Akroma's Will, an instant that lets you choose between all your creatures gaining flying, vigilance, and double strike, or lifelink, indestructible, and protection from each color until the end of the turn
(It can't be blocked as long as defending player controls a nonbasic land.) Equip Artifact - Equipment Color tag templates(None) Wrecking Ball Arm Equipped creature has base power and toughness 7/7 and can't be blocked by creatures with power 2 or less