You dont need to build your deck around this piece of removal to make it good, but if you do, itll be fantastic
Casting this for 5 is easy, but not very good
Sunken Hollow
Slightly Lost Boy Being Evasive is a plus, but theres not a lot else going for this particular card, unless you really need an Evasive character with four strength
In real Magic theres an immediate penalty to six cards, though in Duels of the Planeswalkers, gamers are given a freebie (which is not uncommon as house rules in many establishments)
A lot of mana ramp, some utility creatures, ways to make tokens and steal their stuff and maybe some card draw and you've got yourself a recipe for a 75% deck that's going to steal a lot of their creatures but won't be reliant on them to play creatures since you'll have a lot of your own