Mind raiser, Contested Steel

Euipd creature has Lifelink and Wither.
You may look at the top card of your library at
anytime. You may cast cards from the top of your library as long as Mind Raiser is equipped.
Whenever a player deals damaged to you, it's controller gains control of Mind Raiser,
Contested Steel.
Equip-discard a card and pay 2 life.