VJMP-JP251 マジックカード「クロス・ソウル」 Magic Card: “Cross Soul” (Spell Card: “Soul Exchange”)
Normal Spell Card
You can only activate 1 card with this card’s name per turn.
(1) Immediately after this effect resolves, Tribute Summon 1 monster, and if you do, it cannot be Tributed this turn. When you do, you can Tribute a monster(s) your opponent controls, even though you do not control them.
(2) If this card is sent from the field to the GY: Activate this effect; your opponent can apply this card’s 1st effect.

Source