Hi evrybody !
element should be death, darkness and/or earth
grave digger 4Q creature 2/4
ability : 1earth quantum : buried a creature, act exactly as burrow ability.
1death quantum : excavation : pull out a creature from the earth ( unburrow )
excavation : 2Q : remove burrow status from a creature, creature still have the burrow ability
trench war : 3Q : buried a creature, act exactly as burrow ability.
perhaps trench war should be 2Q but it's quite too powerfull....
I'm not sure that a creature can have more than one ability.....