Now, in the Alchemy format, where Alrunds Epiphany is much weaker, the deck has adapted to be more focused on the board in Game One
Functionally, Yuna's Whistle is a pseudo-cantrip that always replaces itself with a creature, and finding the creature gives you some +1/+1 counters too, so there's combat trick potential as well
When she hits the battlefield, she pulls out your favorite Ally, and for WUBRG, she gives your field a massive buff
U/R - Otter - Classic instant and sorcery shenanigans
Alternatively, you could copy an enchantment like City on Fire, allowing Terra to one-shot a player with commander damage in this form
Epic Experiment Sorcery Exile the top X cards of your library