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Will-Forged Golem [Magic 2015] from Magic: The Gathering. This artifact creature displays a metallic golem with glowing blue glyphs, holding its arm out with sparks. With a mana cost of 6 and 4/4 power and toughness, the card text describes the "Convoke" ability.

Will-Forged Golem [Magic 2015]

ๆฅ่‡ช Magic: The Gathering
$0.24 - $0.49
$0.49
$0.24 - $0.49
$0.49
Set: Magic 2015
Type: Artifact Creature โ€” Golem
Rarity: Common
Cost: {6}
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
The modular nature of the automaton's design makes assembly perfectly intuitive.