Flying (This creature can't be blocked except by creatures with flying or reach.), haste (This creature can attack, and as soon as it comes under your control.) Whenever Pyreswipe Hawk attacks, it gets +X/+0 until end of turn, where X is the greatest mana value among artifacts you control. Whenever you expend 6 (You expend 6 as you spend your sixth total mana to cast spells during a turn.), gain control of up to one target artifact for as long as you control Pyreswipe Hawk.