Ren, Rousing Executant

Whenever Ren attacks, you may exile a
Saga card from your graveyard. If you do, Ren
gains first strike and trample until end of turn.
Whenever Ren deals combat damage to a player,
for each Saga exiled with it, choose one of its
chapter abilities. Copy each chosen ability.
"I once heard a story that you'd never believe!"