The first version say
You can only activate this card while there is a face-up Spellcaster-Type monster(s) on your side of the field. Tribute 1 monster on your side of the field and Special Summon 1 Spellcaster-Type monster from your hand. Then you can destroy 1 monster on the field.
The recently reprinted version in Legendary Collection 3, Yugi's World say this:
If you control a face-up Spellcaster-Type monster: Target 1 monster you control; Tribute that target, then Special Summon 1 Spellcaster-Type monster from your hand, then you can destroy 1 monster on the field.
The only target is listed in the first half which is your own monster. But as I said, Yugioh have really stupid rulings regarding certain things.