changeling cards mtg War-Spike [Modern Masters] Changeling (This card is every creature type.) When this creature enters MTGNexus - Changeling

If an effect makes you discard a card and you dont have any, nothing happens

Did I mention this card only costs three mana

The deck then features a number of cards with proliferate abilities, which will make all of your creatures with +1/+1 counters even bigger, and also shrink all of your opponent's creatures who have -1/-1 counters (not to mention add to your opponent's poison counters)

That's not good

Kaalia is a veteran of the competitive commander scene, so you can expect many players to have a game plan when she shows up - removal, removal, and removal

It's also a decent alternative to running more tutors if you can't afford the good ones, since more cards drawn means more chances to find the card you were looking for