Peculiar Dice

[BawmeELO]

[i]In an ancient tomb on an unknown continent, a strange sight was beheld. Rows upon rows of stone crypts faded into the darkness, white on the left, black on the right. On a plinth in the centre of the room were two dice, each made of the same stone as one set of graves and decorated in gold. In stark contrast to one another, each dice had a worrying effect. When a die was rolled, a crypt hewn of that rock would crack open and a creature would emerge, as if it had not been sealed away for centuries.[/i]

...Okay, cheesy B-movie intro aside, I had an idea for a couple of cards. They're two dice (obviously) and they're based on being Synchro/Xyz support.

[quote]
[b]Peculiar Ivory Die[/b]
Level 2
Light/Rock/Tuner
500 ATK/1000 DEF

Once per turn, you may roll a die. Special Summon a non-Tuner Monster whose level is equal to the number rolled from the Hand or Graveyard. Its effects are negated. If the number rolled was 1 or 2, reduce this monster's level by 1. If the number rolled was 5 or 6, increase this monster's level by 1.
[/quote]

[quote]
[b]Peculiar Ebony Die[/b]
Level 2
Dark/Rock/Effect
500 ATK/1000 DEF

Once per turn, you may roll a die. Special Summon a Monster whose level is equal to the number rolled from the Hand or Graveyard. Its effects are negated. Either make the level of this card equal to the value rolled, or add the value rolled to this monster's current level. This card cannot be used as a material for an Xyz Summon the turn you activate this effect.
[/quote]

These aren't really built with any particular deck build in mind; I just wanted to get my ideas down. Hey, any experience is good experience, right?

Any feedback is also good feedback, hint hint?