Thoughtseize

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Underground Sea

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

Counter target noncreature spell unless its controller pays {2}.

{T}: Add {C}.
{T}, Sacrifice Wasteland: Destroy target nonbasic land.

Counter target activated or triggered ability. (Mana abilities can't be targeted.)

Each player loses 1 life, discards a card, sacrifices a creature of their choice, then sacrifices a land of their choice.