Windcrag Siege

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

"Fate has brought us together to do battle for the Grail! But first, I wish to make a proposition.What think you of yielding the Grail to me, and joining my glorious ar