Strider, Lord Of The Dunedin

First-strike, Reach, Defender
{w}, {t}: Exile Strider, Leader Of The Dunedin until end of turn.
Whenever Strider, Leader Of The Dunedin blocks, Bolster 1.
At the beginning of each end step, if there is
a black creature with power or converted
mana cost 5 or greater transform Strider, Leader Of The Dunedin.