Outside of Commander, Birgi has made a name for herself in Standard, Pioneer, and even Modern, as she's even better than more traditional cost-reduction permanents
What's that counterspell doing in this Timmy dragons lair
Some instant-speed spells, like the Swift End half of Murderous Rider, can destroy creatures or Planeswalkers
The first is a triggered ability: "When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
The weakest Pokmon cards have very low base stats and abilities