Tetra, The Zodiac

Hero (You may tap any number of Civilian creatures you control to pay for that much mana towards casting this creature.)

When Tetra, The Zodiac enters, search your library for an Artifact card, reveal it and put it into your hand. Shuffle.
{1}{g}: Tetra, The Zodiac gains your choice of one of the following until end of turn: Flying, Haste, Lifelink or Indestructable.