Well, it's sometimes super awkward to have to tap down our tokens to convoke Loxodon into play
Elas il -Kor, Sadistic Pilgrim Blood Artist is one of the strongest sacrifice cards ever printed
Here, since you have to tap to use it, and you only have 6 uses, I like it with haste in Red or equipment, untaps or haste like Thousand-Year Elixir and then after it's done, a blink effect like Momentary Blink
Starter 2 Player Starter Set enhanced rule book with 6th Edition rules front and back
A lot of these are 4- and 5-drops, and all have different versions of the ways they interact with dead creatures, but many of them are commanders, and all are powerful enough to consider if you're looking to double dip on some powerful ETBs