This is a small archetype I came up with almost a year ago when I first started making my own cards, so my apologies if they're broken or just plain bad. They're mainly focused on dealing burn damage, but are mostly reliant on monster effects to inflict it. The naming scheme is "storm" translated into different languages, except for Temen Oblak, whose name comes from a song of the same name and means "dark cloud". My logic for making them WATER/Thunder was based on MtG's making lightning mostly red (cf. Lightning Bolt), but since making them FIRE wouldn't make sense, I made them WATER instead. Please feel free to give any criticism you feel is necessary.
(My apologies for the font being weird; I copied the text from Google Drive.)
Temen Oblak, Supreme Storm Elemental
If your opponent has taken 2500 or more damage this turn, except from battle, you can Special Summon this card from your hand or Graveyard. Once per turn, when your opponent takes Effect Damage, you can Special Summon one “Storm Elemental” monster from your Deck. It cannot attack this turn. You can only control one “Temen Oblak, Supreme Storm Elemental”.
Storm Elemental Stuhi
When this card is Normal Summoned, inflict 800 damage to your opponent. If this effect activates while you control another “Storm Elemental” monster, inflict 500 more damage to your opponent.
Storm Elemental Ekaitz
When your opponent takes Effect Damage from the effect of a card you control, except “Storm Elemental Stuhi”, you can Special Summon this card from your hand, then inflict 500 damage to your opponent. You can only Special Summon one “Storm Elemental Ekaitz” per turn this way.
Storm Elemental Nevihta
When this card is flipped face-up, you may inflict 600 damage to your opponent. You can Tribute this card: All Effect Damage your opponent takes this turn is increased by 500. Only one “Storm Elemental Nevihta” may be Tributed per turn to activate this effect.
Storm Elemental Dröhnen
If you control 2 or more “Storm Elemental” monsters, you can discard this card from your hand; this turn, when you activate the effect of a “Storm Elemental” monster: Inflict 500 damage to your opponent. You can only activate the effect of “Storm Elemental Dröhnen” once per turn.
Add 1 “Storm Elemental” monster from your Deck to your hand. You can banish this card from your Graveyard: inflict 600 damage to your opponent. You cannot activate this effect during the turn this card is sent to the Graveyard.