Zeiphir, Esper's Emissary

Compound (the power and toughness of a creature
with Compound is equal to the number of Artifacts of
it's archetype you control times itself.)
{p/b}{p/b}{x}: Actuate X (Pay 2X life, then place X Artifacts from anywhere onto the battlefield
under your control, tapped. If you pay 10+ life,
take an extra turn after this one, also you gain
Psychic Fervor for the rest of the game. (All mana sources you control produce two additional mana of
their color while you control them.)