You do have to add a +1/+1 counter on it to do so, but as Ive said prior counters are a bounty these days so I dont think that will be a problem
Rarity - Common, Uncommon, Rare, Mythic 3
Each time one or more cards leave your graveyard during your turn, it puts a +1/+1 counter on a creature you control, allowing your board to grow over time
4 Knight Of The White Orchid Is A Ramping Creature Knight of the White Orchid is an older card than Loyal Warhound, and it's better in almost every way
The natural play pattern is to load Obuun up with its own counters so the creatures it makes hit even harder, but this could also lead a counters-based deck that uses it to spread a bunch of free counters around
2 tutorial guides to lead you through the decks