Any removal spell that can target any permanent can target a Planeswalker as well
If another player gains control of Blightwing Bandit, that player can't look at or cast the cards, and you still can
Some of the yellow cards that highlight their typical effects include Pound from Kingdoms of Intrigue [OP-04] which allows the player to add one of the opponents Characters with a cost of 3 or less to the bottom of the opponents Life card and place it face-up, Charlotte Perospero from Pillars of Strength [OP-03] which has a Trigger effect that when activated, allows the card to be played after the player discards a card from the hand, and Thunder Bolt from the same set which enables the player to KO an opponents Character with a cost of 5 or less after trashing a card from the top of the players Life area
Very few creatures disrupt Commander this efficiently
Wrenn and Seven is an exceptional ramp tool, scooping up land cards from your deck and then placing them directly on the field
Decree of Annihilation Next up is Decree of Annihilation, which takes things quite a few steps further than anything Obliterate was planning on doing