Daxos of Meletis can't be blocked by creatures with power 3 or greater.
Whenever Daxos of Meletis deals combat damage to a player, exile the top card of that player's library. You gain life equal to that card's converted mana cost. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.
9/15/2013 If Daxos is blocked by a creature, raising that creature’s power to 3 or greater won’t change or undo the block.
9/15/2013 If the exiled card is a land card, you won’t gain any life and you won’t be able to play the land.
9/15/2013 You must pay all costs to cast the exiled card. You may pay alternative or additional costs. If the card has any mandatory additional costs, you must pay those.
9/15/2013 Daxos doesn’t change when you can cast the exiled card. For example, if you exile a creature card without flash, you can cast it only during your main phase when the stack is empty.