Has there been a FIRE Thunder monster before?
RD/KP10-JP040 サンダーガゼル Thunder Gazelle
Level 4 FIRE Thunder Effect Monster
[REQUIREMENT] If your opponent has no cards in their hand, you can activate this by shuffling 2 monsters from your GY back into the Deck.
[EFFECT] Choose 1 face-up monster you control. During this turn, that monster’s attacks pierce. (When attacking a Defense Position monster, inflict battle damage equal to the difference of how much the ATK exceeds the DEF.)