Exuberant Wolfbear — ruling 1

Exuberant Wolfbear’s power and toughness are unaffected when the target Human takes on those values.

Exuberant Wolfbear — ruling 2

You choose whether the Human’s base power and toughness change as the ability resolves, not as the ability is put onto the stack.

Exuberant Wolfbear — ruling 3

Any 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.

Exuberant Wolfbear — ruling 4

The 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.

Exuberant Wolfbear — ruling 5

If 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.

Exuberant Wolfbear : règles, fonctionnement et interactions (MTG)

Exuberant Wolfbear is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

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.

How it works : Exuberant Wolfbear

Original English text — Wizards of the Coast / Scryfall

#1April 17, 2020· Wizards of the Coast
Exuberant Wolfbear’s power and toughness are unaffected when the target Human takes on those values.
No other card is named in this ruling.
#2April 17, 2020· Wizards of the Coast
You choose whether the Human’s base power and toughness change as the ability resolves, not as the ability is put onto the stack.
No other card is named in this ruling.
#3April 17, 2020· Wizards of the Coast
Any 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.
No other card is named in this ruling.
#4April 17, 2020· Wizards of the Coast
The 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.
No other card is named in this ruling.
#5April 17, 2020· Wizards of the Coast
If 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.
No other card is named in this ruling.