Something along the lines of Mole Town Defender (kneel 1 influence to stand 1 defender), but that will work in more often then when I am defending a challenge.

agot.dbler.com - Check out the first 5 cards here. They're the only 'stand with influence' effects. There's several other ways to stand a character though. Out of Stark Frozen Outpost stands a defender and gives a strength boost. At Night They Howl stands all creature cards. To Be A Wolf stands a character and lets you search for another card.