Spacemen the Grifening

[Marquesas]

The rules are subject to change, but the working concept so far:

• Players take turns playing cards. A player's turn consists of: start-of-turn effects, draw phase, main phase, battle phase, end-of-turn effects.
  
• Draw phase: Draw one card unless otherwise specified.
  
• Main phase: Play any amount of effect and equipment cards - you may have up to 5 effect and equipment cards on the field at any given time. You may also play up to 1 creature card. You may have up to 5 creature cards on the field at any given time.
  
• Battle phase: Each creature on your side of the field may attack up to once unless incapacitated or otherwise prevented by an effect. No cards may be played after the beginning of battle phase unless allowed by a special effect, but face down cards may be activated.
  
• A creature is defeated in normal battle if its DEF is lower than the ATK of the attacking creature. The difference is then subtracted from the HP of the player whose creature was defeated. If the attack fails (DEF is higher than the attacker's ATK), then the difference is subtracted from the HP of the attacker, and additionally, if the ATK of the defender is higher than the DEF of the attacker, the attacker is defeated.
  
• Each player initially has 100 HP. Normally, the player who loses all of their HP loses. There are additional ways to win.
  
• Each player must play with a minimum of 40 and a maximum of 80 cards.
  
• If a player must draw and is out of cards to draw, that player loses.