: Planeswalkers each have a number of activated abilities called “loyalty abilities.” You can activate a loyalty ability of a planeswalker you control only at the time you could cast a sorcery and only if you haven’t activated one of that planeswalker’s loyalty abilities yet that turn.If it has no loyalty counters on it, it’s put into its owner’s graveyard as a state-based action. Damage dealt to a planeswalker causes that many loyalty counters to be removed from it. Activating one of its abilities may cause it to gain or lose loyalty counters. A planeswalker enters the battlefield with a number of loyalty counters on it equal to the number printed in its lower right corner. Spells and abilities that affect creatures won’t affect them. When your planeswalker spell resolves, it enters the battlefield under your control. You can cast one at the time you could cast a sorcery. : For Garruk's third ability, the number of Wurm tokens you put onto the battlefield is determined when that ability begins resolving.: If the greatest power among creatures you control is 0 or less, you'll draw no cards.: For Garruk's second ability, the greatest power among creatures you control is determined when that ability begins resolving.
