Perseus Jackson, Seaweed Brain

Partner with Annabeth Chase, Wise Girl
Islandwalk, Haste
Whenever Perseus enters the battlefield, create a legendary artifact token named Riptide and equip it to Perseus.
Whenever a demigod you control or own dies, goad Perseus and give it a +1/-1 counter. The goad effect lasts until your next upkeep.
Perseus Jackson's power and toughness is equal to the number of islands you control.