There are some instances where having more cards in your deck is actually a good thing, but most decks will only benefit from keeping their total deck size at or as close to 40 as possible
3 Abyss Shark is a Phenomenal Archetypal Extender First Printing: Legendary Duelists - Duels From The Deep When it comes to Fish-type monsters, there is no more prevalent archetype than Sharks, as this archetype has been on the fringes of the meta for years now
This one-mana sorcery allows you to draw two cards and then discard two cards
We battle some guys around the Club including the places Chief Sculptor, and lose to all of them
If a Vehicle has a strong enter-the-battlefield or ability trigger when attacking, this allows you to use them while ensuring the Vehicle stays safe or getting the triggers twice in one turn
The cycle of Mirrodin Suns is a little strange in that its rarely a bad time to cast one because you can always get it again later for more (assuming it resolves)