Equip Helm to Celebrant, make a new Celebrant on combat, attack and exert it, then repeat the process during your extra combat
It isn't a specific card set that you can point to - though I will list some good examples later on - just that they exist
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With tons of ways to pull things out of the graveyard, having a way to easily dump all your creatures there is powerful, and Old Stickfingers does it perfectly
This is especially easy to justify if I have access to an eBay Bucks promotion, which gives you 3-10% of your purchase back as credit to use on another purchase
If you fail to draw your early-game ramp cards, you tend to suffer a pretty slow defeat