Shiara, Dawnfrost Invoker

Flying
Instead of paying the activation cost of a wizards
ability you may instead tap that wizard to use it's
ability, but if you do, that wizard afterwards loses
all it's abilities until your next turn.
If you control no other wizards at the end of
your turn, exile Shiara, then put her back into
play, transformed under your control.
"When the Eldrazi were finally gone, we had to find
allies to survive in this new harsh world."
- The Invokers' Tales