Greater Stealspell (Su)
Source: Advanced Player's Guide, p. 83
A sandman’s stealspell power improves at 15th level. When a target fails a save against his stealspell performance, the sandman discovers its spell resistance (if any) and all spells it has prepared or knows. He can then choose which spell to steal. The sandman may forgo stealing a spell and instead reduce the target’s SR by an amount equal to half his bard level and gain that amount of spell resistance for as long as he continues performing. If he steals additional spell resistance, it stacks with previously stolen SR. If he steals a spell or ceases performing, the spell resistance immediately reverts back to its owner. This performance replaces inspire heroics.