If you play this on turn 1 it's actually a pretty decent wincon without much support. At the risk of embarrassing math: just playing 2 lands and this card (and activating it t2 and beyond) would be:
Turn
Counters EOT
Notes
1
0
Play land and this
2
4
Land and this untap (2), then double (4); play second land
3
14
2 lands and this untap (4+3), then double; assuming no more lands
4
34
3 untaps (14+3), then double
5
74
6
154
7
314
8
634
9
1,274
Double to 1,274 and win
Ways to untap this thing obviously help a ton, but more permanents actually don't seem to decrease the clock at all.