Hugin & Munin has lackluster base stats, and on average, I would not expect the Response ability to be worth it. Your hero is usually the only character you can ready for value and not just tempo (though Aerial decks have some notable exceptions, and one basic attack from your hero has a low chance to kill a full-health minion. That being said, Hugin & Munin's traits are what make it interesting. "Aerial" has lots of synergies like Air Supremacy, "Asgard" gives Thor and Valkyrie another target for The Bifrost, and "Bird" makes this searchable by Sam Wilson's alter-ego ability. Having 3 total traits makes H&M very appealing for a Strength in Diversity deck, especially because Asgard and Bird are redundant with very few other allies. Lastly, Thor, Valkyrie, Winter Soldier, and any future heroes highly incentivized to engage minions will find this card useful.

• Its not a forced response. They can still just play as a cheap 2-cost ally
• Adds 3 rare traits for Strength in Diversity sheanigans
• • Of them all its Aerial, an enabler of powerful cards and combos
• On mid-late you can definitively get more benefit than perjuice of his response
• Its also the first foundation step towards an unortodox Leadership Thor deck with Squared Off for engagements' needs
• • As sidenote of that, they can be a target for The Bifrost
• Their response is quite interesting in multiplayer with Rapid Response: block other player's villain with them, get them back and ready your hero to block with yourself or the birds, another villain's attack. If the villain first activated with you, the upcoming minion wont attack you.

Thor and Tigra usually benefits the more, from having a minion engaged

Now that you know this information, go and let your creativity loose on your next deck with Hugin & Munin!