Mask of the Jadecrafter [The Brothers' War] Condition:Heavily Played put a flood counter on

put a flood counter on target land

What mechanics are mentioned in the card text

except their base power is half that creature's power and their base toughness is half that creature's toughness

Set: Future Sight Type: Creature — Horror Rarity: Rare Cost: {4}{B}{B} Fear (This creature can't be blocked except by artifact creatures and/or black creatures

Set: Murders at Karlov Manor Type: Land — Swamp Forest Rarity: Rare (T: Add B or G

Mask of the Jadecrafter [The Brothers' War] Condition:Heavily Played put a flood counter onSet: The Brothers' War Type: Artifact Rarity: Uncommon Cost: {2} {X}, {T}, Sacrifice Mask of the Jadecrafter: Create an X X colorless Golem artifact creature token. Activate only as a sorcery. Unearth {2}{G} ({2}{G}: Return this card from your graveyard to the battlefield. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)