Mausoleum Wanderer (Borderless) 

Cost: 1 Blue

Type: Creature — Spirit

P/T 1/1

Ability: Flying(This creature can't be blocked except by creatures with flying and/or reach.)
Whenever another Spirit you control enters, this creature gets +1/+1 until end of turn.
Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays X, where X is this creature's power.

Innistrad Remastered (INR)