Volo, Itinerant Scholar

When Volo enters, create Volo's Journal, a legendary colorless artifact token with hexproof and "Whenever you cast a creature spell, note one of its creature types that hasn't been noted for this artifact."
{2}, {T}: Draw a card for each creature type noted for target permanent you control named Volo's Journal.
Choose a Background

当沃洛进战场时，派出传奇衍生神器沃洛的札记，其为无色，且具有辟邪与「每当你施放生物咒语时，记下其生物类别中的一种，且须为此神器未曾记录者。」
{2}，{T}：目标由你操控且名称为沃洛的札记之永久物每记录过一种生物类别，便抓一张牌。
选择身世