The Sound of Drums (Extended Art) (Surge Foil) [Doctor Who] XY200a and an extensive gazetteer provides

and an extensive gazetteer provides an overview of the majestic elemental planes—including two new ones: the decaying Plane of Metal and the vast and orderly forests of the Plane of Wood

Ion Cannon Turret

and rules to adds more ways to play the Aliens: Another Glorious Day In The Corps

It's not an economic question

keeping a Chapter Mage in one’s retinue is proof of power and influence

The Sound of Drums (Extended Art) (Surge Foil) [Doctor Who] XY200a and an extensive gazetteer providesSet: Doctor Who Type: Enchantment Aura Rarity: Rare Cost: {2}{R} Enchant creature Enchanted creature is goaded. If enchanted creature would deal combat damage to a permanent or player, it deals double that damage instead. {2}{R}: Return The Sound of Drums from your graveyard to your hand.