Its safe to say you shouldnt rush to buy every single white draw effect anymore, as were always getting more
1 Fellwar Stone
(My Equinaut Deck is a deck based around Equilibrium and Fleetfoot Panther that plays and replays creatures with self-bounce triggers to abuse various triggers like Aura Shards, the bounce trigger, or tap them before they had back with Opposition, and so forth)
The specific cause of this spike though is just one of those cards: Captain Howler, Sea Scourge
In the right go-wide deck, such as Elves or Goblins, you can easily get boosts in the +4/+4 to +5+5 range going, too, which are very hard to deal with
The second is having flexible, powerful spells like Day of Judgment