The main issue with this card is the fact that the effect it has to special summon itself from the Graveyard isnt a once-per-turn effect, meaning all you need to do is find a way to destroy it repeatedly and have enough plant monsters in your graveyard and youve immediately got a game-winning strategy
This means that you need to damage characters with Resist +1 with 2 damage, just to do a single point of damage, and characters with Resist +2 with 3 points
(This is referred to as 'defeating' the Battle.) One point of damage removes one defense counter, and so on
How Can You Avoid or Get Around Cumulative Upkeep
With 160 HP to start with, it can be pretty beefy and hard to get rid of unless you focus on dealing super-effective damage
You pay the cost, show the card to your opponent and let them read it, then you use its ability and put it into the discard pile