I was sure I read something recently that stated a deathtouch creature blocked by multiple creatures can allocate only one point of damage to each creature in order to kill the next in line. So, for example, acidic slime with lure blocked by duty-bound dead first and then vampire nighthawk second, both would die as the attacker can allocate one point to each creature.
Where previously I thought the first creature would take the full two damage and the second would not be killed.
Also, if the attacker CAN put one point into each creature, is it only because it has deathtouch or is it like that for all creatures blocked by multiple creatures.
if your creature is blocked by multiple creatures you need to assign lethal damage to one creature before you can move on to the next one with deathtouch any positive amount of damage is considered lethal
note that this assignment doesn't care what actually happens to the damage (for example even if it will be prevented it is still considered "lethal", it will just not destroy the creature) and it doesn't work with other abilities like from Lowland Basilisk , even if it is quite similar to deathtouch
After lethal damage has been assigned to a creature, further damage can be assigned to the next one in the damage assignment order. (In the case of trample, if all creatures have already been assigned lethal damage, further damage can be assigned to the player or planeswalker being attacked.)
With deathtouch, even a single point of damage is considered lethal. So yes, an Acidic Slime could destroy two creatures blocking it.
509.3. Third, for each blocking creature, the defending player announces that creature’s damage assignment order, which consists of the creatures it’s blocking in an order of that player’s choice. (During the combat damage step, a blocking creature can’t assign combat damage to a creature it’s blocking unless each creature ahead of that blocked creature in its order is assigned lethal damage.) This turn-based action doesn’t use the stack.
702.2b Any nonzero amount of combat damage assigned to a creature by a source with deathtouch is considered to be lethal damage, regardless of that creature’s toughness.
