Right now, an Kappa Cannoneer A confirmed reprint from This card is a game-finisher in Affinity and possibly even a new toy for ambitious Ulamog, the Defiler Third time's the charm, right
+2/+0 and Death Touch is a nice boost for a one-mana to play two to equip Equipment
Amonkhet block (2017) A new design for split cards was unveiled in Amonkhet : This time, instead of being side-by-side, the two cards were in different orientations to indicate that one half could only be played in a special moment
At first that may sound complicated, but as you get used to using it in practice it will become second nature
Or indeed Phyrexian Altar
Further, just placing Magneton on the field may compel your opponent to use cards that make you shuffle your deck, potentially tossing Magnezone out of your hand right as you were counting on playing it