2+ Thunder monsters
During your Main Phase, if this card was Link Summoned: You can target 1 of your "Thunder Dragon" monsters that is banished or in your GY; apply the effect listed on it that activates by discarding itself, then place it on either the top or bottom of your Deck. You can only use this effect of "Thunder Dragon Thunderstormech" once per turn. If a Thunder monster(s) you control would be destroyed by battle or card effect, you can banish 3 cards from your GY instead.