Leonardo da Vinci: Until end of turn, Thopters you control have base power and toughness X X, where X is the number of cards in your hand. , : Draw a card, then discard a card. If the discarded card was an artifact card, exile it from your graveyard. If you do, create a token that's a copy of it, except it's a 0 2 Thopter artifact creature with flying in addition to its other types.

add one mana of any color

Then return all land cards from your graveyard to the battlefield tapped

They mutate into the creature on top plus all abilities from under it

Channel —

planeswalker

Target creature gets -5/-5 until end of turn

Guided by Fate or another enchantment you control enters

You may choose new targets for target spell or ability

it deals 1 damage to you

Whenever a player casts their second spell each turn

Exile target creature

: Until end of turn