Its generally best to cast it on your turn, but the flexibility of playing it on your opponents turn is nice, and youll have plenty of options to discard since you see four new cards for 4 mana
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Peak Value: $5,000$7,000 USD (est.) (BGS 9) Why It's Valuable: A unique artifact from Antiquities that untaps lands, enabling powerful mana-generating combos
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The ability you need to prevent blocking and damage is protection, which prevents creatures with some specific quality (usually a color) from being able to block, damage, and basically affect the protected creature in any way
Cynthias Garchomp ex Description