Gon Freecss, Daring Fisherman

When Gon Freecss, Daring Fisherman enters the
battlefield, create a legendary 3/3 blue fish
creature token named The Lake Master with
islandwalk and haste.
If The Lake Master deals combat damage, you
may sacrifice it, if you do, draw three cards.
Otherwise, discard a card and put two +1/+1
counters on The Lake Master.