Lavabrink Venturer
Creature — Human Soldier
As Lavabrink Venturer enters the battlefield, choose odd or even. (Zero is even.)
Lavabrink Venturer has protection from each converted mana cost of the chosen value.
"Take one wrong step out of here and you're dead. I take only right steps."
Illustrated by
Ikoria: Lair of Behemoths Promos#19pRareEnglishLegality
Rulings
You choose odd or even for Lavabrink Venturer before it enters the battlefield. There’s no point at which players can target it before it has gained the appropriate protection abilities.
If Lavabrink Venturer somehow has no choice made for its ability, its last ability grants it no protection abilities.
For spells with 
in their mana costs, use the value chosen for X to determine the spell’s converted mana cost. If a permanent or card in any other zone has in its mana cost, X is considered to be 0.
The converted mana cost of a token that isn’t a copy of another object is 0. A token that is a copy of another object has the same converted mana cost as that object.