While Rest in Peace is on the battlefield, abilities that trigger whenever a creature dies won't trigger because cards and tokens are never put into a player's graveyard
There are times when I want to run Goblin Bombardment or other sacrificial or "Do something with a dork" but they require a certain threshold of creatures in your deck to function
Wizards provides the Commander Power Brackets and our tiers add a bit more nuance
There are a few variations of the game you can play with the set boosters, but if you are looking to buy set boosters, then these are consistently damn good value
This black creature can be a secret sweeper, and even if it dies, youll probably get a lot of value
For example, a spell might have different effects if you control a certain number of snow permanents, and some costs can only be paid with mana from snow sources