Due to the unique way this 5 card God Link interacts, a 20 card God Link is possible. (4 copies of 5 gods)
The following is for a full 5 God link;
"Five Element Gods"
Light / Water / Darkness / Fire / Nature
■ This creature can't be blocked.
■ This creature can attack untapped creatures.
■ This creature breaks 5 shields.
■ Power attacker +8000.
■ Whenever your opponent would choose a creature in the battle zone, this creature can't be chosen. (It can still be attacked and blocked.)
■ When you draw at the beginning of your turn, you may draw 4 cards.
■ Whenever this creature attacks, your opponent selects 4 creatures on his/her battle zone and destroys them, then puts 4 cards in his/her mana zone into graveyard.
■ When this creature is put into graveyard, you may return a god to your hand from grave.
■ Whenever this creature would link with another god, tap an opponent's creature.
If all 20 gods (4 of each of them) are God Linked to each other, the result is a creature that has 88,000 power, a total power of 240,000 when attacking and forces your opponent to chose 76 creatures and mana to put into their graveyard, and breaks 80 shields.