They get uncastable giant creatures out of our hand and into the graveyard, they refill our hand with fresh gas to play, and of course, they trigger Sefris (so long as we discard at least one creature)
Soul of Windgrace Whenever Soul of Windgrace enters the battlefield or attacks, you can return a land from any graveyard to the battlefield tapped under your control
Humans are an extremely powerful tribe with tons of cards to choose from
Sacrifice after III.) I, II Jecht Beam Each opponent discards a card and you draw a card
Trick or Treat Vito, Thorn of the Dusk Rose - $8 Nonfoil / $8.75 Foil Satoru Umezawa - $0.50 Nonfoil / $0.60 Foil Voja, Jaws of the Conclave - First Nonfoil / $8.22 Foil Wilhelt the Rotcleaver - $8.43 Nonfoil / $8.76 Foil Liberator, Urza's Battlethopter - $5 Nonfoil / $5 Foil Total = $21.93 Nonfoil and Voja / $31.33 Foil Wait a sec, did the price total just go down
Artifact Color tag templates(None) Solitude Flash Lifelink When this creature enters, exile up to one other target creature