With Foundations, well see that price drop a bit more
For this list, Im considering permanents with activated abilities or triggered abilities that allow you to sacrifice creatures or permanents as well as cards that require a sacrifice as an additional cost
Celebrate Pokmon with Pikachu V and Pikachu VMAX, two takes on one of the best-loved inhabitants of the Pokmon world
It allows you to fire off a bounce spell in the early game, and then once you unlock the Locker Room side, you get a Reconnaissance Mission-style effect
Entering the battlefield with four loyalty, this Ajani totes a useful +1 ability that significantly boosts one of your creatures until the end of the turn, providing it with +1/+1, first strike, vigilance, and lifelink