Kefnet can't attack or block unless you have seven or more cards in hand.
: Draw a card, then you may return a land you control to its owner's hand.
Kefnet is a cheap, indestructible mono-blue beater that demands you keep a fat hand (seven-plus cards) to swing or block. You durdle as a draw-go control deck, stockpiling cards and stuffing the board with counters and removal, then close fast since Kefnet is a recurrable 5/5 flyer that bounces to hand when threatened. His activated ability turns excess mana into card advantage and lands you can replay.
Indestructible 5/5 flyer for 3 mana that dodges most removal
Built-in card advantage engine that fuels its own attack condition
Mono-blue gives access to the best counterspells, card draw, and tutors
Easy to recast and re-protect since blue bounces and protects cheaply
Can pivot between Voltron beatdown and pure control
The seven-card hand requirement is fragile and easy for opponents to disrupt
Mono-blue struggles with enchantment and artifact removal
Exile, bounce, and -X/-X effects bypass indestructibility
Slow clock if you can't keep your hand full and connect
Vulnerable to graveyard-light hate like discard and Narset/Hullbreacher style draw lockdown
Legendary Creature — God
