Monument to Perfection

Conversely, replacement effects that apply to the number of counters put on a player can modify the counters placed this way. For example, Vorinclex, Monstrous Raider's last two abilities can apply to counters placed this way.

Because the last ability causes Monument to Perfection to lose all the abilities, activating it multiple times before the first activation resolves does not result in it having multiple instances of toxic 9.

Toxic doesn't change the amount of combat damage a creature deals. For example, if a 2/2 creature with toxic 1 deals combat damage to a player, that creature will deal 2 damage. The results of that damage are the player loses 2 life and gets a poison counter.

If a creature with toxic deals combat damage to a creature or planeswalker, or if it deals noncombat damage, toxic has no effect and no player gets poison counters.

Monument to Perfection's last ability lasts indefinitely.

Any other effects of that damage, such as life gain from lifelink, still apply.