Even if you bin a Think Twice with Alchemy, you are still paying 3 mana for an extra card
With mana ramp, you can accomplish this much earlier
Although not quite it feels about as close to "Destroy a land and your opponent discards a card" as we are likely to see for three mana in these golden situations
As mythic rares, these cards are going to be difficult to pack anyway, but these variants are likely to be highly sought after once the set launches, not just for the value a complete set of the elder dragon cards may hold, but also for their eligibility as Commanders
Which is why, when the first Pro Tour since MTG Final Fantasy hit, I was curious as to what exactly this sets impact on the tournament
Character(s): Elsa, Reck It Ralph, Scar, Kronk