Or digging into your life points with a Summoned Skull
Field Spells have a compass rose icon, and remain in the Field Spell Zone indefinitely
If the player's Net Ocean has run out of cards, regardless of whether they won or lost the battle, discard all other cards from the Digimon box such that only the Level III Digimon card remains (this is treated as the Digimon reaching its lifespan)
This is another format that plays with 2 players
Treat SV1A as a Japanese box with regular hits, AR/CHR texture depending on the era, and one SR-or-better style slot, with SAR/CSR/UR/alternate-art outcomes as chance upgrades
Decks relying on multi-stage combos or heavy evolutions, particularly Megas, benefit enormously