CardName: Spark Reactor
Cost: {4}{U}{U}
Type: Artifact
Pow/Tgh: /
Rules Text: Cards you own with Overload have Overload {0}.
Flavour Text: Tony Spark built this in a cave, with a box of scraps.
Set/Rarity: Multiverse Design Challenge Rare
Spark Reactor
R
Artifact
Cards you own with Overload have Overload .
Tony Spark built this in a cave, with a box of scraps.
For Challenge # 070
I can't help but deliberately interpret this as the wrong reference, and suggest it be given morph.
It's crazy powerful; but CMC6 so maybe that's ok? Wording.. maybe "In your hand" as that's the only place it matters?
Not so; you can pay Overload costs for cards cast by things like Diluvian Primordial.
EDIT: I'm wrong. The rulings even say so.