"Peaceful Planet Calarium" Rating Score by ねこーら

Comprehensive evaluation: There is no problem if you use it on the first turn of the first attack or divide it by 《Ancient Fairy Dragon》.
It looks like it can't put out the tuners searched by 《Mannadium Riumheart》by strengthening the whole, but it refers to the number of tuners in its own field GY.
If there is no tuner in the field GY, his ATK will not change and Mannadium Riumheart will remain at 1500 attack and 2100 defense, and the searched tuner can be put out as it is.
Use this card on the 1st turn of the first attack, connect it with Mannadium Riumheart → Manadum Tuner, and connect it to a Level 6 Synchro Monster.
If you go second and interfere with the opponent's first move with 《Ash Blossom & Joyous Spring》etc., it will be useless.
Or after searching, divide by 《Ancient Fairy Dragon》and cancel all strengthening.
It looks like Mannadium Riumheart doesn't have the right to summon because it's necessary to play Ancient Fairy Dragon with another card first, but this can also be compensated for by the deployment effect of Ancient Fairy Dragon.
In fact, you should prepare Manadum Tuner and 《Mannadium Riumheart》, put out Manadum Tuner first, destroy it with Rium Heart, recruit with Tuner's effect, and revive with (3) of this card. It will be.
Or search for 《Visas Starfrost》and get involved.