I am thinking about making a planeswalker card for Urza (I am sure it has been done by many many people)
I want it to be kick-ass but not an auto-include in any deck.
And I have the below flavor want to incorporate into the card.
1. Empower artifacts (Mightstone)
2. Weaken artifacts (Weakstone)
3. Sacrifice other planeswalker for his goal (Invasion saga)
4. Destroy Phyrexia at all cost
So, below is my design. Please comment (on the flavor or power level, or both)
I actually fulfill the 2nd and 3rd design goal with the 2nd ability. This also makes Urza the ultimate planeswalker-hoser. And if there is no other planeswalker around, Urza will need to work a long way to get to ultimate.
Planeswalker - Urza (Loyalty:4)
+2: Put a +1/+1 counter on all artifact creatures you control. Put a charge counter on all non-creature artifacts you control.
-3: Remove all counters from all other permanents. For each counter removed this way, put a loyalty counter on Urza Planeswalker.
-15: Exile all other permanents. For each black permanent exiled this way, its controller loses 3 life.