My first cards :)

[yourmomsface]

Here they are.

lore naturia fern: This card cannot be normal summoned or set. This card can only be special summoned in defense position by having 10 or more "Naturia" monsters in your graveyard. When this card is special summoned, select one face up "Naturia" monster. It gains ATK equal to its level x100. When that monster is destroyed, you can tribute this card to select one "Naturia" monster in your graveyard. Special summon it during your next main phase.

lore gamma ray burst: This card can only be activated when your opponent declares an attack. Send the top card of your deck to the graveyard. If it is a monster, take 800 damage. Then destroy all cards your opponent controls (including spells and traps).

[Iaashadow]

gamma ray burst is op'd, VERY op'd
I (running naturia) like naturia fern, it needs some work though
for fern 7/10
for gamma ray 3/10

[ragnarok1945]

can't read the monster, so I'll just do the trap

nuking all your opponent's card for just 800 damage that might even happen is OPed

you need to give it a bigger cost