Win command and potential to remove an opposing unit, what's not to like

This thing is expensive but once you get it out it will likely stick around a while and have a big impact on the game.

This unit is quite overrated IMO. 6 for a 2/4/6 is very bad (compare to units like Black Legion Heldrake or Ultramarines Dreadnought), so you're really paying for the ability, which can easily be played around. On the plus side, this unit does have the Daemon trait, so you can potentially bring it down to a more reasonable cost via Cultist sacrifices.

As mentioned by Kingsley, currently feels a bit overrated. For sure it's ability and the fact that it is Daemon would set it up for a great card. However Chaos has trouble winning Command struggles to begin with. Making this card a 3/5 at best for me personally.

For clarification, is this card only effective against cards that explictly state they may be sacrificed, like Chaos Faction cards, or can it also be used against other cards without it, like Space Marines?

For clarification, is this card only effective against cards that explictly state they may be sacrificed, like Chaos Faction cards, or can it also be used against other cards without it, like Space Marines?

They have to discard any non-warlod unit at that planet.  I don't think there is a unit in the game yet that would be immune to this reaction (even stalwart ogryn could be sacrificed, as this is not an event...I believe). 

The 'If able' part  is more to helping resolve the case of when your opponent doesn't have a unit at that planet. 

It's a nice card, but I wouldn't committ any units to the same planet as this guy unless I was sure I could get rid of him somehow.  Starbane can exhaust him, but his reaction still goes off if you lose the struggle (though, losing 2 command is a pretty heavy blow).  I think it's best played at the end of deployment, when most units and resources are expended.  Certain victories could be turned around instantly with this card.  The two command and the massive health and damage will take out most command-centered units.  But it's a hefty price to pay.

For clarification, is this card only effective against cards that explictly state they may be sacrificed, like Chaos Faction cards, or can it also be used against other cards without it, like Space Marines?

The thing to recognize is that the effect of this card is forcing the opponent to sacrifice a unit. As a result, the requirements (non-warlord at this planet) and benefits (nothing) of the sacrifice are defined by this card and its effect. Whether a card can or can't be sacrificed by other effects or for other benefits doesn't matter because those aren't the effects that are being triggered/resolved when using Soul Grinder.