The optimal answer here depends on whether you care about the creature you dont want to block attacking you
Gideon of the Trials goes a long way toward protecting Huatli, Warrior Poet, which can set up some huge attacks when you want to turn the corner
Rare first edition set cards can also fetch a good price
Magic no longer produces World Championship Decks
(To mill a card, put the top card of your library into your graveyard.) Legendary Creature - Rat Warlock Ink-Eyes, Servant of Oni Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever Ink-Eyes deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control
Tap it for mana, and then, if you want to have everyone draw a card, its there, ready to be used