Amulet of Safekeeping
{2}
Artifact
Whenever you become the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.
Creature tokens get -1/-0.
Frost Titan
{4}{U}{U}
Creature -- Giant
6/6
Whenever ~this~ becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {2}.
Whenever ~this~ enters or attacks, tap target permanent. It doesn't untap during its controller's next untap step.
Unsettled Mariner
{W}{U}
Creature -- Shapeshifter
2/2
Changeling (~this~ is every creature type.)
Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.