This can be before blockers are declared, after blockers are declared but before combat damage is dealt, during combat after combat damage is dealt, during the postcombat main phase, during the end step, or, in some unusual cases, during the cleanup step
These take effect as explained by the text on the card
Promo cards can include special cards from Disney events, tournament and Set Championship promo cards, and other promotional cards for things like gift sets and more
In the example above, you can see that the amusingly named Minnie Mouse, Funky Spelunker gets a Strength bonus of +2 when shes at a Location
// Vigilance On turns where the effect of Summon: Yojimbo's second or third chapter ability is applying, your opponents can choose not to attack with a creature that must attack if able as long as there is no other player, planeswalker, or battle for that creature to attack that wouldn't require a cost