Benefactor's Draught

Oracle Text
Untap all creatures. Until end of turn, whenever a creature an opponent controls blocks, draw a card.
Draw a card.
Card Rulings
11/8/2016 You must cast Benefactor’s Draught before blockers are declared in order to draw any cards from its delayed triggered ability.
11/8/2016 Each player will have a chance to cast instants and activate abilities after Benefactor’s Draught’s delayed triggered abilities have resolved, before combat damage is dealt.
11/8/2016 If multiple copies of Benefactor’s Draught resolve in one turn, each creates a delayed triggered ability and each will trigger when its condition is met.
*gestures to giant, now-untapped green creatures that deal damage even if they're blocked*