mtg discard a card deal damage The Flame of Keld [Dominaria] Death by Draw and Discard

This new rules term tracks how much mana you've spent to cast spells over the course of the turn

It has far greater potential to end up with a board in your favour than all bar cards like Martial Coup

A Rampant Growth cast on turn 2 or 3 means we can cast The Gitrog Monster on turn 4 instead of 5, assuming we hit our first 4 land drops (don't skimp on lands!)

This made Oracle of Mul Daya incredibly useful with other Zendikar cards, but the Oracle is useful in plenty of other decks that run green, too

Losing control of Locke after the last ability has triggered won't affect your ability to cast a spell from among the milled cards