Welcome the Dead

The clever part is that the draw-and-discard clause and the token clause count the same event, but the wording is precise about which events qualify. The tokens scale with cards put into your graveyard from your hand or library this turn, so the spell's own discard is a guaranteed one, and any self-mill or hand-dumping you did earlier stacks on top. What does not count is the graveyard filling that happens from the battlefield: a fetchland cracking, a permanent sacrificed to an outlet, a creature dying in combat. Those all deposit cards into the yard, but from the wrong zone, so they add nothing to the Zombie Druid count. The coupling is the design idea: the spell pays you a body for the graveyard-filling you were already doing, so the loot is never pure card advantage but a down payment on a board. Black card draw almost always charges life for the privilege, and losing 2 here is the tax; the wrinkle is that the discarded card is not waste but ammunition, feeding the token count on its way to the yard. Flashback does not change the math. Cast from the graveyard, the spell still draws two and discards one, and that discard still puts a card into the yard from your hand, contributing exactly as it does the first time. It rewards graveyard-as-resource play: the more you have discarded or milled before it resolves, the wider the army it leaves behind.