This list was very hard to do and highlighted a significant aspect of cube design
Early-Installment Weirdness: His signature weakness, "Cover Up," is the only card in the whole game that uses clue tokens to keep track of your progress towards disabling it
Lion Umbra Modern Horizons 3 s Lion Umbra requires a deck dedicated to modifying your creatures, otherwise you won't have anything to enchant with it
Additionally, Leonardo's , ability lets you draw a card, discard an artifact, and create a Thopter token copy of that artifact
Snagging a card as part of the bargain is useful since just shuffling cards into a graveyard is rarely worth a card unless you can exploit the mechanic
SR Super Rare ZS - Armed Sage X LIGHT Level 4 [ WarriorEffect ] ATK 300 DEF 900 If the only monster you control is 1 Level 4 monster not named "ZS - Armed Sage", you can Special Summon this card (from your hand)