The key thing to note here is that the ability is restricted based on power, not mana cost, meaning Alesha can cheat expensive creatures like Herald of Leshrac or Abyssal Horror into play for explosive early-game value
Aces Baseball Bat (WHO Surge foil $1) Same idea, two mana, three power, one to equip
Your commander, Ishkanah, brings a steady flow of spider tokens to the field and uses your filled graveyard to drain your opponents life totals
The card gets outclassed when you really push mana acceleration, but Im plenty happy having Wall of Blossoms alongside a lot of messed-up Vintage Cube cards, so it has value everywhere
The main idea would be to return cards to the top of the opponent's deck with, for example, a Memory Lapse and then use some spell that allows you to exile the top card