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However, Phyrexian Tower can be useful in just about any black Commander deck, as it always gives you an option to trade in a creature for a quick mana boost

(To populate, create a token that's a copy of a creature token you control.) If you choose to copy a creature token that's a copy of another creature, the new creature token will copy the characteristics of whatever the original token is copying

Use rigid storage when traveling with cards

The example I first used when I introduced the concept of lenticular cards to all of you was Black Cat

...which has flying and deathtouch Pair with Accorder's Shield for max chaos Eye of Nidhogg is an enchantment that transforms a target enchanted creature into a 4/2 black Dragon with flying and deathtouch