Definitely lol. I run that heartless summoning combo in my legacy mill deck. This was mostly just for jokes. But im still brewing in my head to see if i can make it a viable concept without it turning into a token swarm like you mentioned. Thanks for the input though!
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Altar is powerful if left unchecked. I play tested against one of my friends blue white control deck and i never combo'd for obvious reasons but just fetching for lands with two Altars did a lot of work.