Galen, Lucky Engineer

If you control ten+ artifacts you have adv. on your
first D20 roll each turn.
{3}: Roll a D20.
1: Exile the top card of your library.
2-12: Scry 1, Exile the top card, you may play it this
turn.
13-17: Scry 1, Draw a card.
18-19: Scry 2, Exile the top card, you may play it
until end of your next turn.
20: Scry 2, Exile the top card, you may play that
card for free.