Aetheric Siphon

As an additional cost to play this card, pay X life. Create a 0/X Esper Core token with defender, indestructible and "all creatures your opponent controls gain trample, and must attack this token
if able."
{t}: Activate only if X is 20 or more. Exile up to 5
lands from your library, then put that many Artifacts from anywhere onto the battlefield,
tapped. If you control more than X untapped Artifacts at your next end step, you win the game.