Comet, Stellar Pup

Each + loyalty symbol in Comet's abilities means to put the indicated number of loyalty counters on him. Each – loyalty symbol in Comet's abilities means to remove the indicated number of loyalty counters from him. The only difference is Comet uses these symbols in the effects of his abilities rather than the costs. Good boy, Comet.

None of Comet's abilities require a target. All choices for cards, creatures, or players are made as the abilities resolve.

Each die is identified by the number of faces it has. A six-sided die is a die with six equally likely outcomes: 1, 2, 3, 4, 5, and 6. The roll must be fair. Although physical dice are recommended, digital substitutes are allowed except in cases where the physical die is required for the effect.

If an ability triggers "whenever you roll a die," it will trigger whenever you roll any die, including the planar die. This is a change from previous Un- rules. Some abilities use the result to determine part of the effect. If you get a non-numerical result (currently just the planar die, but the future is long), that part of the effect won't do anything.

If a die is rerolled, the original roll essentially never happened: it doesn't cause any abilities to trigger, and no effect that cares about die rolls will consider it.

Something in the game must tell you to roll a die. If you roll a die for any other reason (to simulate a coin flip, to choose pizza toppings, to create alternate timelines), that roll doesn't count.