Rill's Vortex Warp

If you control an artificer, you may discard a blue spell or an artifact spell instead of paying this spell's mana cost.
Choose one. If you control an artificer, choose any number instead, and choose different targets for each mode.
• Tap target creature.
• Untap target creature.
• Return target creature to its owner's hand.
{bull} Target creature can't be blocked this turn.