Force of Will

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.

Gamble

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Exile target creature. Its controller gains life equal to its power.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

If you control a commander, you may cast this spell without paying its mana cost.
Counter target noncreature spell.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

If you control a commander, you may cast this spell without paying its mana cost.
Exile target creature.

Undaunted (This spell costs {1} less to cast for each opponent.)
Destroy two target creatures.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Search your library for a creature card, reveal it, then shuffle and put the card on top.

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.