Thats where Collector booster boxes come in
But if you need to build something on the fly, you can usually just grab a stack of recent commons, take about sixteen cards of one color, grab fourteen lands of the matching basic land type, shuffle them together, and have something that works for teaching
Five mana is a bit on the expensive side as far as combination protection-evasion equipment goes, but the Cloak has stood the test of time
Singing Tree ($140) Singing Tree is a good defensive green creature thats quite versatile
As such, its very common for beginner collectors to start their collections with a focus on one or two Pokmon instead of a full set, with Pikachu being one of the top contenders
Players will keep the creatures that are most useful to steal off the battlefield until Deadpool's no longer a threat, and can - with a bit of effort - easily shut you down before your copying shenanigans get too silly