Mystic Piper isn't very useful in a metagame where 3 Pots of Greed per deck is okay, but I see how Meklords might be trouble.

What about this?
[hider=Avici Lotus, take 2]
Avici Lotus
Level 8 DARK Plant Effect monster
0 ATK / 0 DEF
Once per turn, during your end phase, if you control a level 1 monster on your side of the field, you can special summon this monster from your hand or graveyard. While this card is face-up on the field, you take no battle damage. During your standby phase, send all cards on the field to the graveyard. When this card is destroyed, destroy all level 4 or lower monsters in attack position, then take 300 damage for each of them. During the turn this card leaves the field, you cannot attack your opponent directly.
[/hider]