Traptrix Rafflesia does just that: Once per turn, at quick effect speed, you can detach an XYZ material from this card to send any normal Hole trap card from your deck to the graveyard to have this cards effect become that trap cards effect providing that the activation conditions are met
Thanks to Commanders starting life total of 40, this is a one-mana 6/6 with Flying and Lifelink in most games, earning it a spot in a ton of lists
Even [casthaven]Cloudpost[/casthaven] mandates that you have a second (specific) land in play, but [casthaven]Eldrazi Temple[/casthaven] plays [casthaven]Eldrazi Mimic[/casthaven] or a 2/2 [casthaven]Endless One[/casthaven] on turn one with no problem
Iraxxa, Empress of Mars creating tokens, Flaming Tyrannosaurus, which can even be a win condition depending on the power it has when it dies, and Memory Worm, to deal damage and force an opponent to draw a card, hence being able to trigger Ian Malcolm this way
1 Kiwi Magician Girl Kiwi Magician Girl's effect grants you the ability to discard Kiwi Magician Girl to give the other Magician Girls a boost to their attack and defense for the whole turn, depending on how many of them you have on the field and in your graveyard
I think this should be obvious in a Mandy deck, but it bears repeating
