What about the following effect:
This card can only be destroyed by battle.
This monster's ATK becomes equal to its DEF during the opponent's turn.
Once per turn, you can switch the ATK and DEF of any number of monsters on the field, including this one.
Full current applicationName and Gender: Leona Goraya, female
Physical Description: A mid-tanned woman, on her late twenties, dark brown hair and brown eyes. Slighty tubby, average height.
Brief Description of the World your Character Comes From: She comes from modern day Russia.
Backstory: Born in a higher-class Russian family, Leona didn't lack anything in her life, except for challenge, which she found in card duelling. It was her grandfather, a fervent player, who brought this into her life. From the bottom of the ladder, she raised to become an expert in her domain. Seeing her looking for more challenger, she and her grandfather entered in a shadow duel, of which the grandfather knew from suspicious origins. He however didn't know the full implication of a shadow duel, and the consequence from defeating her.
1: Starter Deck
Structure Deck: Machine Re-Volt
2: 'Signature' monster
Holy Colossus
******
ATK 1600 DEF 2600
LIGHT Machine/Synchro/Effect
1 Tuner + 1 or more non-Tuner Machine-Type monsters
This card can only be destroyed by battle.
This monster's ATK becomes equal to its DEF during the opponent's turn.
Once per turn, you can switch the ATK and DEF of any number of monsters on the field, including this one.
3: Support cards
Holy Automaton
***
ATK 800 DEF 1000
LIGHT Machine/Effect
This card can only be destroyed by battle.
When this card is sent from the field to the Graveyard: Add 1 "Holy" monster from your Deck to your Hand.
Holy Landship
****
ATK 500 DEF 1800
LIGHT Machine/Effect
This card can only be destroyed by battle.
Select a face-up "Holy" monster on the field. As long as this card is face-up on the field, the selected monster cannot be attacked.
4C: Additional tuner monster
Holy Mechanism
****
ATK 1000 DEF 1200
LIGHT Machine/Tuner/Effect
This card can only be destroyed by battle.
When this card is Normal or Flip Summoned: You can Special Summon 1 "Holy" monster from your Hand.
