Zuurker, Shadow Harvester

Double Strike, Haste, Vigilance, Reach, Lifelink
Shades you control have Skulk.
{b}: Zuurker gets +1/+1 until end of turn.
{b}, Pay 1 life: Other Shades you control get -1/-0 until end of turn. The next time a Shade you control deals combat damage, draw a card.
If Zuurker would deal damage to a player, instead prevent that damage and add that much {b}. Use this mana only to cast or activate abilities of Shades. You don't lose this mana as phases end.