You choose how many targets Ral, Leyline Prodigy's second loyalty ability has and how the damage is divided as you activate the ability
And to give you an idea of how critical he was to the team, when we were getting new desks and I was asked about any requirements for where my new desk would be, one of my requirements was "I need to sit next to Hindy." Hindy, along with Andrew Brown and Jadine Klomparens, did a fantastic job figuring out what this set would mean for Standard and worked with the whole Play Design team to put it through its paces
It's only drawback came from the mana costs on both sides of the card: you either got the Hoodwink of countermagic or an overcosted Dark Banishing
If your group is okay with it, Id add Aura Shards for some removal
At the beginning of the archenemy's first main phase each turn, they reveal the top card of the scheme deck and carry out its effect
That means its subject to cost-reducers, like Defiler of Faith and Heralds Horn