Its three mana, and with the mana cheating red does so efficiently, having this land enter tapped isnt as bad as in some of the other colors
After all the card effects are resolved, then the card is discarded
Snow decks can make good use of both sides, but the snow commanders essentially a mana-doubler in these decks, whereas Kaldring is a slow, attrition-based card that requires some set-up
Being a 0/1, hell have to wait to help out until after hes already explored and gotten a +1/+1 counter by revealing a nonland card
And unlike Sorin, she doesn't require a commitment to a single tribe, she's good in more builds
It would have been a shame to have a bunch of creature reprints that prevented iconic and cult classic characters alike from making their well-deserved appearance in this set