Whittle your opponent down, and Zidane, Tantalus Thief becomes an effective finisher that does better than remove a blocker
Of them, giving your entire team haste is clearly the best
If you turn Cave of the Frost Dragon into a creature but haven't controlled it continuously since your most recent turn began, you won't be able to activate its mana ability or attack with it
The particular beauty with this one, is that it won't come in tapped
This process works very well for proxying actual Magic cards too, or making your own Magic cards
Sylvan Safekeeper Invitational/World Championship Winner : Olle Rde Tournament : 1997 Magic Invitational Olle Rde was the first winner of a Magic Invitational, but for a few reasons, including taking a hiatus from Magic, the card wasnt printed for a few years after his win