You can discard this card and 1 "Darklord" card; draw 2 cards. (Quick Effect): You can pay 1000 LP, then target 1 "Darklord" Spell/Trap in your GY; apply that target's effect, then shuffle that target into the Deck. You can only use each effect of "Darklord Ixchel" once per turn. You can only Special Summon "Darklord Ixchel(s)" once per turn.
Here are the Spell/Trap cards you can copy and retrieve with Darklord Ixchel’s effect. Additionally Darklord Contact is the best card you can use to summon her so that you can immediately copy its effects and summon another Darklord.
Because Darklord Ixchel discards herself to use her first effect, the best way to summon her is through revival. The aforementioned Darklord Contact and Darklord Descent can also be used to accomplish this.
Aside from revival here are some other ways you can summon Darklord Ixchel. Fires of Doomsday and Stray Lambs are almost the same, but Fires of Doomsday is preferred because it can be activated during your opponent’s turn.