that means, you can, in fact spot 1 or 2 (if both pippin and merry are in ) ents more, than you really have, great for cards, like
Leaflock, finglas or every other card, that requires to spot an ent. it is really evil with
ent draught, cause you not even need to play ents in the deck, then

these ents you spot virtually, so you do not need to pay twilight for them if you move, it is just for spotting