Ardent Plea is a uncommon Enchantment card from Alara Reborn (ARB), collector number 1. Current market price: $1.15 (foil $5.93), TCGplayer market prices via Scryfall.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)