Pioneer's set legality is actually quite simple
If youre looking for a blue card to sac creatures repeatedly, youre stuck with this, Drowned Rusalka, and the unplayable Marjhan
Magic Cards: 25 1 Monster Reborn: This powerful Magic Card allows you to Special Summon a monster from ANY Graveyard
SR Super Rare Ultimate Fusion X SPELL Quick-Play During the Main Phase: Fusion Summon 1 Fusion Monster from your Extra Deck that mentions "Blue-Eyes White Dragon" or "Blue-Eyes Ultimate Dragon" as material, by shuffling the materials mentioned on it from your hand, field, and/or GY into the Deck, then, you can destroy face-up cards your opponent controls, up to the number of "Blue-Eyes White Dragon" and "Blue-Eyes Ultimate Dragon" used from the field as material
Essentially, this card destroys all of the opponents cards and then damages their life points to the equivalent attack of all the combined attacks of the destroyed monsters
No, it must be thrown, not dropped