Sergei, Invisible Sun

Artifacts you control gain " {2}, {t}: Sacrifice this artifact: Target creature you control gains Deathtouch until end of turn. Then, it Connives."
Whenever you sacrifice an artifact, target Instant or Sorcery in your Graveyard gains Retrace. (You may cast this card from your graveyard by discarding a land card as an additional cost to cast it.)