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 start of your turn, you may draw 4 cards.
■ Whenever this creature attacks, your opponent chooses 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 from your graveyard to your hand.
■ Whenever this creature would link with another god, choose one of your opponent's creatures and tap it.
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.