AncientMermaimon

On Play When Digivolving Return 1 of your opponent's level 4 or lower Digimon to the hand. For each of your other Digimon, add 1 to the level this effect can choose.

All Turns When this Digimon would leave the battle area, from this Digimon's digivolution cards, you may return to the hand or play without paying the cost 1 level 4 or lower blue Digimon card.

[DigiXros -2 Lanamon×Calmaramon]