CardName: Amphitheatre of Duels
Cost:
Type: Land
Pow/Tgh: /
Rules Text: {T}: Add {1} to your mana pool.
{2}{W}, {T}: Target creature gets +1/+1 until end of turn.
That creature attacks or blocks this turn if able.
Flavour Text:
Set/Rarity: Multiverse Design Challenge Uncommon
Amphitheatre of Duels
U
Land
: Add to your mana pool.
, : Target creature gets +1/+1 until end of turn. That creature attacks or blocks this turn if able.
: Add 
to your mana pool.
,
Created for Challenge # 110 and Challenge # 033. A reference to Touch of Rage. It was a bit hard to find a white effect from the last five cards on Challenge # 033; this was the best I could do.
The name really wants to be "Jousting Arena", but the rest of the cycle are "X of Y" so I rephrased it a little.