This spell costs less to cast for each card type among permanents you've sacrificed this turn. Flying (This creature can't be blocked except by creatures with flying or reach.), trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.), haste (This creature can attack, and as soon as it comes under your control.) Whenever Korvold deals combat damage to a player, put X +1/+1 counters on Korvold and draw X cards, where X is the number of permanent types among cards in your graveyard.