Naming Griselbrand means that all of your creature removal can deal with him at no loss of card advantage
Inquisition of Kozilek is an incredibly powerful card: First, it has no downside, its simply a discard spell
They sacrifice something, but don't require anything else like mana, and with haste, you can do them on arrival
10 Kindred Dominance One Type Left Standing On the opposite side of the spectrum from Extinction, Kindred Dominance lets you choose a creature type to keep, and then destroy all the rest
suddenly you're getting 4 damage from your Sword of Fire and Ice, drawing 2 cards, and Shocking two things
It's cheap (mana-wise), it's fast, it lets you get back an instant or sorcery in your graveyard, and it's a 2/1 body that can attack and defend just like any other 2/1 body