New Original Format

I made a new MTG format.

MTG, but It's YuGiOh:

1: Start with 8000 life

2: You can only summon 1 creature per turn normally, and any others must be summoned by card effect

3: You can only have up to 5 creatures summoned normally on your field plus one creature summoned by card effect

4:You can only have up to 5 enchantments and/or noncreature artifacts

5: All creatures have their power and toughness multiplied by 500, and all damage from card effects is multiplied by 500

6: Cards may be played face down to be activated at any time you would be able to play them later

7: Creatures can be set to either "attack position" or "defense position". Creatures in attack position use their power to determine combat strength, while creatures in defense position use their toughness

8: During your main phase, you may switch any of your creatures you choose between attack and defense mode

9: When summoned normally, creatures may either be played face down in defense mode or face up in attack mode, but creatures summoned by card effect are played face up in either defense or attack mode, your choice.

10: All cards with a total mana cost of 4 or less do not have a cost to play. Cards with a cost of 5 or more require a sacrifice of a creature(s) and/or noncreature spell(s). Non creature spells are worth 1 mana of their color, your choice if multi colored. Creatures are worth 1 mana of their color for every 1000 power they have. For spells worth more than 4 total mana, the color requirements must be met.

11: There is no summoning sickness. The player going first may not attack on their first turn, but the player going second may.

12: During the combat phase, attacks are declared individually for each creature attacking. The attacking player chooses which creature to attack. If the attacking creature attacks a creature attack position, the difference in power between them is subtracted from the player with the lower power creature's life, and the less powerful creature is destroyed. If both the attacking and defending creature have equal power, they are both destroyed. If a creature is attacking a defense position monster, that monster is destroyed if their toughness is less than the attacking monster's power. If the defending creature's toughness is greater than or equal to the attacking creature's power, the difference is subtracted from the attacking player's life. If the defending player does not have any creatures on the field, the attacking player may attack the defending player's life directly.

Land is banned