Joshua, the Story-Writer

At the beginning of your upkeep, draw a card. If
you control another creature with power 4 or greater, draw an additional card.
{2}{t}: Target creature gains hexproof until end
of turn.
{4}: Whenever you cast a historic spell, put a lore counter on Joshua, the Story-Writer. Then, if
there are three or more lore counters on it,
transform Joshua, the Story-Writer.