So, in a 1v1 game, casting this means you're guaranteed a three-for-one situation
Ruby/Emerald is a great deck for tacticians interested in countering opponents, with an arguably higher skill ceiling than Amber/Amethyst that can make it a real power deck in the right hands
Teferi, Time Raveler is the same way, as his passive power prevents players from casting instant-speed spells the moment he touches the table, preventing counterplay at a very early turn: as early as turn two if you can get some quick one-cost mana ramp out turn one
Several layers should be applied and should be as thin as possible (this applies to altering in general) without any bumps or texture
Fangren Marauder is another threat that is Flame Slash resistant (that also keeps you alive)
Even if Takenuma was a relatively bad mill spell, the fact you can play the first copy over a basic Swamp at almost no penalty to your manabase would get it into tons of lists