Brutal Cathar units up a steady impact of “If Brutal Cathar has not left the battlefield, then Mon’s Goblin Raiders is exiled”. As soon as Brutal Cathar leaves the battlefield, there is no such thing as a impact inflicting Mon’s Goblin Raiders to be exiled, so it is not. Steady results have an effect on the sport … repeatedly. There is no such thing as a delay in checking whether or not it applies.
In case you had an indestructible creature with “This creature’s energy and toughness are equal to the variety of creatures you management”, then that creature would additionally provide you with a meals token, as a result of on the level at which “create a Meals token for every creature you management” is carried out, it has energy and toughness of two (from itself and Mon’s Goblin Raiders). There is no such thing as a delay within the creature changing into a 2/2. It changing into a 2/2 does not “go on the stack”. It simply IS a 2/2. Equally, Mon’s Goblin Raiders being on the battlefield simply IS. It does not go on the stack.
Some playing cards are as an alternative worded as “When this card leaves the battlefield, the exiled card returns.” In these instances, somewhat than being returned by a steady impact ceasing to use, they’re returned by a triggered capability. In such a case, you would not get a meals token. Additionally, in case you has another everlasting that stated “When a creature you management enters, create a meals token”, you would not get that token till The Battle of Bywater finishes resolving.