Its such a flexible card that you can use it as a closer or just keep it around for early headaches like Esper Sentinel
Kindred Discovery won't fit every deck, but it can be a good fit in merfolk decks, or in blink decks that care about good ETB creatures, like wizard decks
Goblin War Drums, Blanchwood Armor, Mana Breach and Early Harvest probably deserve a look, and Tainted Aether and Darkest Hour are getting thrown in for good measure
Because decks with Gaeas Cradle tend to search for Gaeas Cradle pretty reliably and you can assemble this combo whenever you get a witness with Cradle and enough creatures if youve already cast Snap, I try to play Snap as one of my interactive spells in any deck with Gaeas Cradle
Collector Booster Rarity Breakdown: * " Sol Ring" may be a nonfoil Elven, Dwarven, or Human "Sol Ring" card
When looking for a deck to combine with in the Beginner Box, look for complimentary decks that also have ways of dispersing +1/+1 counters