Heliod distributes +1/+1 counters on creatures or enchantments you control whenever you gain life and can give a creature lifelink for to help you consistently find those lifegain triggers
And while this is the era of the spiking Reserve List card, there are still some great casual cards from this era that are on the Reserve List, but haven't yet spiked
As a tutor effect, I can see it becoming a regular addition to many Brawl decks
For example, a card named Lightning Bolt will always deal 3 damage to any target, whether it was printed in 1993s Alpha set or a contemporary Masterpiece series
Arachnogenesis (MAR) $28.50 Arachnogenesis was already awesome as a green damage-prevention card and staple in spider Commander decks
Its worth mentioning Imperial Seal here, as it does roughly the same thing, though it gives folks a whole turn cycle to mess with the top of your library