core 2015 booster box Unboxing: M15 with Brad Nelson [Magic: the Gathering] The default of large sets moving forward would be 269 Magic the Gathering 2015 Core

Use it just before your draw step or in response to situations where you need an answer

However, I think the bigger opportunity is that this feels like the core to a strong Boros aggro deck: Particularly with all the Heroic+Valiant in Boros

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If you control a "Meklord Astro" monster: You can banish this card from your GY

Effects might see your cards returning to your hand instead of the discard pile when banished, or locking down opposing characters for a turn - making it unable for them to challenge or quest

Krark, the Thumbless I'd give Krark a thumbs-up, but yeah