During your opponent's Main Phase, when they would Special Summon a monster(s): Negate the Summon, and if you do, destroy that monster, then your opponent draws 1 card, then end the Main Phase
outside of tournaments and without the physical cards, and without engaging in the non-standard rulesets found in other mobile experiences like Duel Links, many have cited the lower monetary investment necessary to play Master Duel as an incentive to prioritise their enjoyment in the digital realm over the physical
(They can't be blocked as long as defending player controls an Island.) When this creature dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on this creature
It was in the design files for a while, where it assumed the playtest name layaway, which makes sense since its a mechanic where you can pay a chunk of the cost upfront