If you need to board wipe - especially if you want to set up a Grist win, Deluge of Doom can help by giving all creatures -X/-X, where X is the number of card types in your graveyard
Enchantment - Aura Karmic Guide Flying, protection from black Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, return target creature card from your graveyard to the battlefield
Just the ability to play a little more loosely with your valuable cards can alone be enough to return that tempo cost
The Gitrog, Ravenous Ride consumes its riders to give you card draw, then pulls some lands from your hand to the battlefield
Thanks to Rootha, Mastering the Moment playing into the same design space, Magnus the Red just got a new home
One example is [card]Lotus Guardian