Karn, Legacy ReforgedKarn, Legacy Reforged's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.

Indatha Triome enters tapped

Spend this mana only to cast a creature spell of the chosen type

Put the rest on the bottom in a random order

You may choose new targets for the copies

Landfall — Whenever a land you control enters

Then exile it

a legendary 20/20 black Avatar creature token with flying and indestructible

Activate only if you control a creature with power 4 or greater

As long as you have 30 or more life

: Add one mana of any color in your commander's color identity

Partner (You can have two commanders if both have partner

you may play those cards without paying their mana costs