If you counter the first triggered ability or otherwise remove it from the stack, it will just trigger again immediately if Nine Lives still has nine or more incarnation counters on it
Basically an ETB (and potentially replayable) Explosive Vegetation, and that alone already makes it universally playable for anything that requires effective ramp effects
After all, its not like we have cards that casually give all your creatures every creature type Oh wait we do: [[Maskwood Nexus]], [[Conspiracy]], [[Arcane Adaptation]] just to name a few
$0.35 Gateway Plaza Ravnica Allegiance $3.99 Citadel Gate Commander Legends: Battle for Baldur's Gate $1.79 Manor Gate Commander Legends: Battle for Baldur's Gate $2.29 Gond Gate Commander Legends: Battle for Baldur's Gate $0.99 Explore the Underdark Commander Legends: Battle for Baldur's Gate $1.29 Cliffgate Commander Legends: Battle for Baldur's Gate $2.49 Sea Gate Commander Legends: Battle for Baldur's Gate $0.59 Gatecreeper Vine Return to Ravnica $0.35 Basilisk Gate Modern Horizons 3 Commander Decks $1.29 Heap Gate Commander Legends: Battle for Baldur's Gate $4.49 Baldur's Gate Commander Legends: Battle for Baldur's Gate $0.35 District Guide Guilds of Ravnica 0 results found
Some other sites that sell cards that can also be used as a reference are ChannelFireball, Star City Games, and Card Kingdom