Whenever a player attacks, if they aren't attacking you, that player chooses an attacking creature
Upon death, Smaug creates a huge hoard of 14 Treasure tokens, but few decks can easily kill a 6/6 flying creature
For such an expensive card to be playable, it usually needs to top the curve and win the game
There have been so many busted combo decks making use of Lotus Petal and Lions Eye Diamond, but my favorite will always be what I believe to be the most broken deck in Magic history (at least since the advent of the four-of rule and restricted list), a turn 1 kill deck detailed here , making use of the temporary abusability of Lions Eye Diamond when you could use it to play a spell from your hand before discarding your hand
Kruphix, God of Horizons Kruphix, God of Horizons is one of the most interesting gods for EDH