Throes of Chaos [Modern Horizons] Arlinn Wei Field Marshal's power is

Wei Field Marshal's power is equal to the number of Swamps you control

Set: Onslaught Type: Enchantment — Aura Rarity: Common Cost: {2}{G} Enchant land

Stoneworks and metalworks

Set: Alpha Edition Type: Creature — Demon Rarity: Rare Cost: {3}{B}{B}{B} {T}: Destroy target land

Throes of Chaos [Modern Horizons] Arlinn Wei Field Marshal's power isSet: Modern Horizons Type: Sorcery Rarity: Uncommon Cost: {3}{R} Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.) Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)