Card Draw-Velocity

Rummaging-

Rummaging is when you discard cards before drawing cards. This is a typically Red ability, and works well when you want to aggressively dig through the deck to find cards that aren’t in your hand. It also works well when the cards in your hand are still useful in the grave, like Faithless Looting’s Flashback ability. Cards like Tormenting Voice have been heavily printed recently.

Looting-

Looting is kind of the antithesis to Rummaging: it draws the cards first, and then makes you discard the same amount of cards. As a result, you have access to more information before deciding what to draw and can protect cards in your hand. This works better when you want specific cards in the graveyard, like for meeting Delirium requirements, setting up Madness spells, or binning a big spell to reanimate later. Cards like Frantic Search and Merfolk Looter help these plans.

Regrowths-

Like Rummaging and Looting, Regrowths spend a card but don’t put you up any material. Instead, you spend a card to get a card back, sometimes with stipulations. All three require setup: Rummaging and Looting require cards in hand and Regrowths require targets in the grave. Regrowths and Raise Dead effects work well with spells that put cards in the grave for an early advantage through Bloodrush, Channel, or Cycling.