Windcrag Siege [Tarkir: Dragonstorm Promos] Modern Masters 2017 and mana of any type

and mana of any type can be spent to cast that spell

No one knew who invented it

Set: Fallout Type: Artifact — Equipment Rarity: Rare Cost: {1}{G} Equipped creature has trample and "Whenever this creature deals combat damage to a player

Set: Fallout Type: Legendary Creature — Bear Rarity: Rare Cost: {1}{G} Whenever another Bear enters the battlefield under your control

Windcrag Siege [Tarkir: Dragonstorm Promos] Modern Masters 2017 and mana of any typeSet: Tarkir: Dragonstorm Promos Type: Enchantment Rarity: Rare Cost: {1}{R}{W} As this enchantment enters, choose Mardu or Jeskai. Mardu If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Jeskai At the beginning of your upkeep, create a 1 1 red Goblin creature token. It gains lifelink and haste until end of turn.