yugioh flying fortress sky fire deck Yu-Gi-Oh! - Summon Reactor SK (CRMS-EN012) - Crimson Crisis - 1st Edition Fliegende Festung SKY FIRE: Yu-Gi-Oh!

Activate only when you Special Summon a Zombie-Type monster from the Graveyard: Target 1 face-up monster your opponent controls and send it to the Graveyard, if you do, your opponent takes damage equal to halve the ATK of any Zombie-Type monster summoned by this effect

This means that Dinomist Spinos practically triggers for free

Even if you dont wish to play these decks in real duels, it could be worth purchasing them if you wish to collect certain cards that can be used to build the decks youd prefer to use

But 7, hard-to-cast mana is a lot, it only hits one person, and sometimes you cant use it to get some card draw for yourself