Most commonly Kaheera gets played in decks that don't have any creatures at all (and as such is just a freebie that might have some relevance in grinding Game 1s)
Instead of picking one card out of each pack, you choose two cards out of each pack and pick them at the same time
Three drops will be coming in the upcoming Summer Superdrop, but you're likely going to have to act lightning-fast, because these are all but guaranteed to sell out almost immediately
Preordain Lovely little card, see two or three cards, draw one you want now and more likely one you want next turn
A card that will show up later on in this list gives +1/+1 counters to the creature it finds
They often have abilities that reward attacking alone, bolster their strength in one-on-one combat, or provide bonuses for blocking, making them well-suited for decks that focus on precise, controlled aggression and strong battlefield presence