Beverage Oasis

This card enters battlefield tapped.
{t}: Add {u} or {b} to your mana pool.
{t}: Gain {e}{e}
{e}{e}{e}{e}: Untap target creature you contol and
tap target creature an opponent controls.
"CAFFEINEEEEEEE!!! That's all I need."
- Jirka, Liliana's Lover