TLDR: Turns HP/Recovery value into card draw over course of game. A must include depending on player count and hero.

Generally anything relying on Minions or Side Schemes is going to become better with increased player count, especially minions since their HP doesn’t scale. At 1 player this card is a maybe include for minion heavy scenarios. At two players it’s a must include for minion heavy scenarios (on specific heroes). At 3-4 it becomes viable across most scenarios based on minion frequency. This card is going to feel particularly good on Heroes like Hulk, She-Hulk, or Wolverine. Really anyone witha high health pool and/or recovery that likes to basic attack. She-Hulk really enjoys flipping down frequently and this gives her another reason. Venom also has an above average recovery stat and Project Rebirth to encourage flipping down. His Pistols and Run and Gun encourage basic attacking.

You must defeat the enemy with your hero's basic attack, which is very restrictive.

Hulk can +10 with a basic attack via event and Drax can reach the same amount (yet they are both of the worst characters of all the game).

3 Base ATK heroes can somewhat try to benefit from it, as long as the deck is built around buffing basic ATKs and/or making various basic ATKs per turn.

On the brighter side, this card is permanent and will stay for future reusagement (at the cost of your life)