Take the 2-minute tour ×  At second level Master of Shrouds (LM
p46) gets Summon Undead ability:  Summon Undead (Sp):At 2nd
level and higher, a master of shrouds can summon one or more
incorporeal undead creatures a number of times per day equal to
3 + her Charisma modifier (minimum 1). This ability is otherwise
identical to the summon monsterspells, except that a master of
shrouds adds her Charisma modifier (if positive) to the duration
of the effect.  At 2nd level, a master of shrouds can summon a
single shadow. At 4th level, she can summon one wraith or two
shadows. At 6th level, she can summon one spectre, two wraiths,
or four shadows. At 8th level, she can summon one greater
shadow, two spectres, four wraiths, or four shadows. At 10th
level, she can summon one dread wraith, two greater shadows,
four spectres, four wraiths, or four shadows.  What is the
caster level of Summon Undead ability? What is its spell level?
Given no rules clarification, I'll probably rule that it is
equal to divine caster level,