If you can reach the late game and have mostly single-pip color requirements, Endless Sands can be an okay mana sink
Synergies could be the star of another post, but for now, lets just define a synergy like Wizards themselves do: Synergy refers to cards that work well together and enhance the value of each other
Suck 'em up!" When Leo activates that monster's Attack Position effect, he announces "Vacuumen's Attack Position effect activates!" When Leo activates that monster's Defense Position effect, he announces "Vacuumen's Defense Position effect activates!" When Leo Summons "Morphtronic Videon", he announces "Morphtronic Videon!" Most of the time when Leo attacks with that monster, he announces "Videon attacks!" Spells/Traps When Leo activates "Break
Gitrog is a solid body, that provides insane draw, and places all drawn lands on the field, making it so that your next turn is just, if not much more, dangerous than the turn you played Gitrog
Red Rising Dragon effect: SS Vision Resonator from GY