japanese one piece card game TCG [OP-16] The Time of Battle Booster Box (Japanese) – Piece 04 Kingdoms of Intrigue! Japanese - One Piece Card

The cheapest and most useful of these might be Lightning Bolt, but I also want to highlight Electrodominance

Special Addition: Mystic Sanctuary Technically not a blue card, Mystic Sanctuary is a great land that can produce blue mana and has a great ETB effect

Now youve got a truly craptacular enchantment that just sits on the battlefield, doing a whole lot of nothing

Letting one Bolas Citadel in play is already a big threat, so having one in the command zone you can cast over and over again should be classed as a war crime

It generates mana strictly for activations, giving you more chances to fire off impactful effects from cards that tap, sacrifice, or trigger on demand

There simply arent many copies of these cards in circulation anymore