Elven Shorekeeper

Elven Shorekeeper gets +3/+3 as long as you control seven or more islands
When Elven Shorekeeper enters the battlefield create a 1/1 blue Elf Shaman creature token with "This creature gets +1/+1 for each blue creature you control"
Propagate - {t}: Untap all islands you control, activate this ability only if you control four or more tokens