Get three strikes and knock a player out
As long as it deals combat damage every turn, you can cast any spell you want without paying its mana cost
Notably, Aven Mindcensor prevents any kind of searching
But of all of them, I don't think that any holds a candle to Palace Siege set to Khans
There are 6 Common cards, 1 Common or The List card (The List being special cards, usually reprints, the selection of which can change between sets), three Uncommon cards, 1 non-foil Wild Card (this can be anything from the main set that the booster is a part of), 1 Rare or Mythic Rare from the boosters set, 1 Foil card of any rarity, 1 Basic Land card and, finally, 1 non-playable card, which can be a token, play aide, ad card or art card
Putting a counter on TWO separate creatures is a pretty nice payoff for throwing away a gnome token or a map token, and can really make an attack far more formidable