Sigil of Stormy Tides

The legend rule does not apply to Arcane Sigil enchantments as long as you control no more than one of the same name.
Creatures you control have islandwalk.
Creatures you control with at least 5 +1/+1 counters have "{u}{u}, {t}: Draw a card." and "{u}{u}, {ut}: Target opponent discards a card."