Thrall the Warchief

Whenever you cast a white spell, tap target creature
an opponent controls.

Whenever you cast a blue spell, scry 2.

Whenever you cast a red spell, Thrall the Warchief
deals 3 damage to target opponent.

Whenever you cast a green spell, target creature
gets +4/+4 until end of turn.

“Lok'tar Ogar!”