Onto the card itself, The Astonishing Ant-Man is a two-mana (1G, 1U) 1/1 Human Scientist Hero who gains a +1/+1 counter whenever you draw a card
In blue you're probably sacrificing Food or Clues or Treasures, which is fine
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Solemnity does the same thingwith Kitchen Finks and a sacrifice outlet, we can sacrifice Kitchen Finks an infinite number of times, and since it can't have a -1/-1 counter on it, it just keeps coming back from the graveyard, giving us two life each time we go through the loop
Its seems like a no-brainer to just include both in the deck, but your experience may differ