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So, if my lifelink creature deals lethal combat damage to a regenerated creature, I will still gain life

This makes Altar the perfect pseudo-recursion, with the bonus of synergizing with token doublers like Anointed Procession and ETB effects like Impact Tremors

The Brothers' War was the set prior to Phyrexia: All Will Be One, so you'll be getting some newer cards that can also be used in standard formats if you want

Thanks to Magic turning into a billion dollar industry, combined with the Reserved List preventing some cards from being reprinted, Alpha cards are now absurdly expensive

Its a big, evasive demon, it gives you a strong reason to have demons around, and it replaces itself, among other things