Cheapest priced copy (Ikoria: Lair of Behemoths): $0.35 at Card Kingdom, near mint, their price list as of .
Exuberant Wolfbear 
Creature — Wolf Bear · 4/4 · Uncommon · The List · #IKO-151
Whenever this creature attacks, you may have the base power and toughness of target Human you control become equal to this creature's power and toughness until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 151 | Uncommon | $0.35 | $0.49 |
| The List | IKO-151 | Uncommon | $0.35 | — |
5 rulings from Wizards of the Coast
- 17 April 2020The Human’s new base power and toughness are set to Exuberant Wolfbear’s actual power and toughness, not just its base power and toughness. If Exuberant Wolfbear’s power or toughness changes later in the turn, the Human isn’t affected.
- 17 April 2020Exuberant Wolfbear’s power and toughness are unaffected when the target Human takes on those values.
- 17 April 2020Any effects that modify the Human’s power and/or toughness without setting them to a specific number or value will apply after its base power and toughness are set, regardless of the order in which those effects were created. The same is true of counters that modify its power and toughness.
- 17 April 2020If Exuberant Wolfbear leaves the battlefield while its triggered ability is on the stack, use its power and toughness as it last existed on the battlefield to determine the Human’s new base power and toughness.
- 17 April 2020You choose whether the Human’s base power and toughness change as the ability resolves, not as the ability is put onto the stack.