If a creature leaves the battlefield before an effect instructs it to explore, it still explores
Overall) - Rite of the Dragoncaller AND Kykar, Zephyr Awakener The enchantment in Red makes 5/5 flying Dragons for six mana drop when you cast that instant/sorcery - great for Spellslinger brews like with Talrand, Sky Summoner that go wide
Conclusion I think that most Commander decks will benefit from playing a board wipe or two, because you simply cant guarantee that the natural variance of the format will always be in your favor
However, it's much more of a support card, so I'm giving it an honorable mention
By the time things get back to you, you could be 3 treasure tokens better off
If it's a lot more than that, you're probably looking at a listing from a third-party seller, and not a retail price