booster box of worldwake MTG — Toy Soldier Games and 1 rare card booster box of worldwake Amazon.com:

Whenever a land enters the battlefield under an opponent's control, if they control more lands than you, you can put a land card from your hand into play

This little piggy provides mana of any color, but once the party starts and you start eating food tokens, Prize Pig provides additional mana free of charge

Taxing and punishing effects are Whites specialty, and we need to encourage the printing of these answers even if theyre annoying to play against

I would buy nearly any RL foil card in NM condition from Urza's Legacy or Urza's Destiny for $100 without hesitating a bit

If you don't have a great mana base you should be looking to splash that second colour or cut it all together if you can