it requires an update to your mtg rules txt...
the coding is as follows
[card]
name=Arbor Elf
mana={g}
auto=soulbond 1/3
auto=soulbond {t}:add{g}
abilities=soulbond
type=Creature
subtype=Elf Druid
power=1
toughness=1
[/card]
auto=soulbond *any ability supported by wagic*
abilities=soulbond
the above arbor elf gives itself and its soulbond creature a 1/3 bonus and the ability to tap for green mana.