Special Summon 1 Level 7 or lower "Elemental HERO" monster from your Deck or Extra Deck that cannot be Normal Summoned/Set, ignoring its Summoning conditions
In a little bit of the same vein as Sigarda, you want a bit more rounded self reliance in your five drops and so Thune is not that much more commonly played than Sigarda
Why are people so stubborn
In particular, he summoned a melee soldier with the mobile fortress Fortissimo, and used the effect of the continuous trap level cannon (when a monster is normally or special summoned, it deals 200 damage per level) to pressure the summoning of Jack, Luca, and Lua, solidifying his field and driving the signers into despair
So, with that said, here are the many examples on how to spot a genuine and fake Graded PSA Card