Normally, a creature's base power and toughness are the power and toughness printed on the card or, for a token, the power and toughness set by the effect that created it
If you get possession of some Cardboard Carapaces during a game (for example, Billy drops them off at your table when he's done with his match), they take effect immediately
When you utilize piggybacking, you drill into a part of human psychology where familiarity equates to understanding, which can equate to value and therefore preference
I remove all counters from my sagas and put +/+1 counters on Sin
Many cards name or exclude what they can target, so Acidic Slime does not hit planeswalkers, whereas Jhoira's Familiar, Airbending Lesson, Disruptor of Currents, Leyline of the Guildpact, and Bramblecrush can apply to planeswalkers