you can do it with hecarim as well if he is lvld up.  3 hecarims give all other hecarims and their summons 2 dmg ea.  so 6 more dmg on everything.  clears the board.  works well with zed, especially if you have remove ephereal and put it on an enemy.

Dusk and dawn makes 2 ephereal copies.  the anivias die and res as eggs xD

So dusk and dawn is by far the most broken card in game when played with certain other cards   anivia for instance.   summon 2 of an ally.  they have ephereal.  guess what happens when anivia dies!? lol