Remily, Boombang General

Whenever a goblin enters the battlefield,
you may pay {1}{r}, if you do roll a d20.
1-6 | Create a Goblin Kaboomist token.
9-15 | Create a Goblin Cratermaker token.
16-19 | Create a Munitions Expert token.
Add {b} to your mana pool .
20 | Create a Swarming Goblins token.
Add {r}{r} to your mana pool.