This is a copy of stargrinder's Blitz Mirror Tower, with changes I've made based on my preferences and collection. Really love this tower, it's been a blast!

Changes and new rules:

• Emphasized token makers and cards that ping on spellcast
• Removed copy spells (including Lutri) and cost reduction creatures
• Cards are played facedown as Volcanic Islands
• Before the game, split the 100 cards into approximately equal decks for each player (I haven't tested this much in multiplayer; if decking is an issue use the big shared library)

Original description:

I love Izzet. I love Blitz. This is a two player Battle Tower that plays like a blitz mirror. Spells are played upside down as lands, mono colour cards represent Islands and Mountains, multicoloured cards played this way function as Volcanic Island.

Players draw 7 cards, no mulligans allowed. The deck is common but graveyards are not. Start at 20 life, whoever goes first does not draw.

For multiplayer games, all players draw on their first turn and life totals are reduced. 3 Players should start at 15 life, 4+ players should start at 10 life.

Card specific rules:

• Lava Dart see's any card played as a Mountain (including gold cards played as Volcanic Islands) as valid sac targets.
• Dragon's Rage Channeler see's all cards as having the card type Land so that it can actually function. This is roundabout way of errataing the card to say 3 instead of 4 but I don't care, card's good.
• Mutagenic Growth can be played as a Forest and used to cast Manamorphose. Likewise Manamorphose can be played as a Taiga and Apostle's Blessing can be played as a Plains.
• Manamorphose can be used to create green or white mana for Mutagenic Growth or Apostle's Blessing.
• Lutri, the Spellchaser - If Lutri is in your opening hand, before the game starts you may reveal him, place him in the command zone and play him as your companion. If you do, draw back up to 7 cards before the game starts. The companion mechanic is to be played as written meaning Lutri can be cast directly from the command zone. If destroyed or exiled, Lutri does not return to the command zone.