Explain better what Baron Nashor does.

Baron Nashor is a high-cost, powerful Chaos unit that focuses on battlefield control and buffing your other units. Here is a breakdown of what it does:

1. Battlefield Creation and Entry

When you play Baron Nashor, it automatically adds the Baron Pit battlefield token to the board if it isn't already present. Baron Nashor then enters that specific battlefield.

• Note on the Baron Pit: The Baron Pit token has the ability: "Units can move here from anywhere." This makes it a highly accessible location for your units to move to.
• Scoring: Because playing Baron Nashor creates the Baron Pit and places him there, this can count as "conquering" that battlefield for the purpose of scoring a point, provided you haven't already scored the Baron Pit that turn (RiftJudge FAQ #9221).

2. Protection

Baron Nashor has the ability: "I can't be chosen by enemy spells and abilities."

• This makes him immune to any enemy effects that require the opponent to "choose" or "target" him (e.g., spells that say "Return target unit to hand").
• Important Nuance: This protection does not stop effects that do not "choose" a target. For example, if an opponent plays a card that forces all players to kill one of their own units (like Cull the Weak), Baron Nashor can still be affected because that spell does not "choose" him (RiftJudge FAQ #9385). Similarly, effects that "programmatically select" a unit based on a trigger (like Vex, Apathetic) can still affect him because they do not require the player to make a choice (RiftJudge FAQ #8685).

3. Passive Buff

Baron Nashor provides a passive aura: "Other friendly units have +2 [S] (Might)."

• This buff applies to all your other units on the board, regardless of which battlefield they are on, making your entire board more threatening.

Disclaimer: This is my interpretation based on the card text and existing FAQs. No official rulebook entry exists for every specific interaction with this card.